diff --git a/modules/notification/webhook/webhook.go b/modules/notification/webhook/webhook.go
index 1ee8473dd6..bd7c8b29d3 100644
--- a/modules/notification/webhook/webhook.go
+++ b/modules/notification/webhook/webhook.go
@@ -262,3 +262,18 @@ func (m *webhookNotifier) NotifyIssueChangeStatus(doer *models.User, issue *mode
 		go models.HookQueue.Add(issue.Repo.ID)
 	}
 }
+
+func (m *webhookNotifier) NotifyNewIssue(issue *models.Issue) {
+	mode, _ := models.AccessLevel(issue.Poster, issue.Repo)
+	if err := models.PrepareWebhooks(issue.Repo, models.HookEventIssues, &api.IssuePayload{
+		Action:     api.HookIssueOpened,
+		Index:      issue.Index,
+		Issue:      issue.APIFormat(),
+		Repository: issue.Repo.APIFormat(mode),
+		Sender:     issue.Poster.APIFormat(),
+	}); err != nil {
+		log.Error("PrepareWebhooks: %v", err)
+	} else {
+		go models.HookQueue.Add(issue.RepoID)
+	}
+}
diff --git a/routers/api/v1/repo/issue.go b/routers/api/v1/repo/issue.go
index 09a4e32d2f..426826653c 100644
--- a/routers/api/v1/repo/issue.go
+++ b/routers/api/v1/repo/issue.go
@@ -14,7 +14,6 @@ import (
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/context"
 	issue_indexer "code.gitea.io/gitea/modules/indexer/issues"
-	"code.gitea.io/gitea/modules/notification"
 	"code.gitea.io/gitea/modules/setting"
 	api "code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/modules/timeutil"
@@ -237,7 +236,7 @@ func CreateIssue(ctx *context.APIContext, form api.CreateIssueOption) {
 		form.Labels = make([]int64, 0)
 	}
 
-	if err := issue_service.NewIssue(ctx.Repo.Repository, issue, form.Labels, nil); err != nil {
+	if err := issue_service.NewIssue(ctx.Repo.Repository, issue, form.Labels, nil, assigneeIDs); err != nil {
 		if models.IsErrUserDoesNotHaveAccessToRepo(err) {
 			ctx.Error(400, "UserDoesNotHaveAccessToRepo", err)
 			return
@@ -246,13 +245,6 @@ func CreateIssue(ctx *context.APIContext, form api.CreateIssueOption) {
 		return
 	}
 
-	if err := issue_service.AddAssignees(issue, ctx.User, assigneeIDs); err != nil {
-		ctx.ServerError("AddAssignees", err)
-		return
-	}
-
-	notification.NotifyNewIssue(issue)
-
 	if form.Closed {
 		if err := issue_service.ChangeStatus(issue, ctx.User, true); err != nil {
 			if models.IsErrDependenciesLeft(err) {
diff --git a/routers/api/v1/repo/pull.go b/routers/api/v1/repo/pull.go
index d4ce00fa12..0180aebf89 100644
--- a/routers/api/v1/repo/pull.go
+++ b/routers/api/v1/repo/pull.go
@@ -305,7 +305,7 @@ func CreatePullRequest(ctx *context.APIContext, form api.CreatePullRequestOption
 		}
 	}
 
-	if err := pull_service.NewPullRequest(repo, prIssue, labelIDs, []string{}, pr, patch); err != nil {
+	if err := pull_service.NewPullRequest(repo, prIssue, labelIDs, []string{}, pr, patch, assigneeIDs); err != nil {
 		if models.IsErrUserDoesNotHaveAccessToRepo(err) {
 			ctx.Error(400, "UserDoesNotHaveAccessToRepo", err)
 			return
@@ -317,11 +317,6 @@ func CreatePullRequest(ctx *context.APIContext, form api.CreatePullRequestOption
 		return
 	}
 
-	if err := issue_service.AddAssignees(prIssue, ctx.User, assigneeIDs); err != nil {
-		ctx.ServerError("AddAssignees", err)
-		return
-	}
-
 	notification.NotifyNewPullRequest(pr)
 
 	log.Trace("Pull request created: %d/%d", repo.ID, prIssue.ID)
diff --git a/routers/repo/issue.go b/routers/repo/issue.go
index 9c313e56d4..12ff0a054c 100644
--- a/routers/repo/issue.go
+++ b/routers/repo/issue.go
@@ -574,7 +574,7 @@ func NewIssuePost(ctx *context.Context, form auth.CreateIssueForm) {
 		Content:     form.Content,
 		Ref:         form.Ref,
 	}
-	if err := issue_service.NewIssue(repo, issue, labelIDs, attachments); err != nil {
+	if err := issue_service.NewIssue(repo, issue, labelIDs, attachments, assigneeIDs); err != nil {
 		if models.IsErrUserDoesNotHaveAccessToRepo(err) {
 			ctx.Error(400, "UserDoesNotHaveAccessToRepo", err.Error())
 			return
@@ -583,13 +583,6 @@ func NewIssuePost(ctx *context.Context, form auth.CreateIssueForm) {
 		return
 	}
 
-	if err := issue_service.AddAssignees(issue, ctx.User, assigneeIDs); err != nil {
-		log.Error("AddAssignees: %v", err)
-		ctx.Flash.Error(ctx.Tr("issues.assignee.error"))
-	}
-
-	notification.NotifyNewIssue(issue)
-
 	log.Trace("Issue created: %d/%d", repo.ID, issue.ID)
 	ctx.Redirect(ctx.Repo.RepoLink + "/issues/" + com.ToStr(issue.Index))
 }
diff --git a/routers/repo/pull.go b/routers/repo/pull.go
index f3a9aca2a4..3defd04b1b 100644
--- a/routers/repo/pull.go
+++ b/routers/repo/pull.go
@@ -24,7 +24,6 @@ import (
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/util"
 	"code.gitea.io/gitea/services/gitdiff"
-	issue_service "code.gitea.io/gitea/services/issue"
 	pull_service "code.gitea.io/gitea/services/pull"
 	repo_service "code.gitea.io/gitea/services/repository"
 
@@ -772,7 +771,7 @@ func CompareAndPullRequestPost(ctx *context.Context, form auth.CreateIssueForm)
 	// FIXME: check error in the case two people send pull request at almost same time, give nice error prompt
 	// instead of 500.
 
-	if err := pull_service.NewPullRequest(repo, pullIssue, labelIDs, attachments, pullRequest, patch); err != nil {
+	if err := pull_service.NewPullRequest(repo, pullIssue, labelIDs, attachments, pullRequest, patch, assigneeIDs); err != nil {
 		if models.IsErrUserDoesNotHaveAccessToRepo(err) {
 			ctx.Error(400, "UserDoesNotHaveAccessToRepo", err.Error())
 			return
@@ -784,11 +783,6 @@ func CompareAndPullRequestPost(ctx *context.Context, form auth.CreateIssueForm)
 		return
 	}
 
-	if err := issue_service.AddAssignees(pullIssue, ctx.User, assigneeIDs); err != nil {
-		log.Error("AddAssignees: %v", err)
-		ctx.Flash.Error(ctx.Tr("issues.assignee.error"))
-	}
-
 	notification.NotifyNewPullRequest(pullRequest)
 
 	log.Trace("Pull request created: %d/%d", repo.ID, pullIssue.ID)
diff --git a/services/issue/issue.go b/services/issue/issue.go
index 06472d8650..ee2f176a43 100644
--- a/services/issue/issue.go
+++ b/services/issue/issue.go
@@ -10,15 +10,20 @@ import (
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/notification"
-	api "code.gitea.io/gitea/modules/structs"
 )
 
 // NewIssue creates new issue with labels for repository.
-func NewIssue(repo *models.Repository, issue *models.Issue, labelIDs []int64, uuids []string) error {
+func NewIssue(repo *models.Repository, issue *models.Issue, labelIDs []int64, uuids []string, assigneeIDs []int64) error {
 	if err := models.NewIssue(repo, issue, labelIDs, uuids); err != nil {
 		return err
 	}
 
+	for _, assigneeID := range assigneeIDs {
+		if err := AddAssigneeIfNotAssigned(issue, issue.Poster, assigneeID); err != nil {
+			return err
+		}
+	}
+
 	if err := models.NotifyWatchers(&models.Action{
 		ActUserID: issue.Poster.ID,
 		ActUser:   issue.Poster,
@@ -31,18 +36,7 @@ func NewIssue(repo *models.Repository, issue *models.Issue, labelIDs []int64, uu
 		log.Error("NotifyWatchers: %v", err)
 	}
 
-	mode, _ := models.AccessLevel(issue.Poster, issue.Repo)
-	if err := models.PrepareWebhooks(repo, models.HookEventIssues, &api.IssuePayload{
-		Action:     api.HookIssueOpened,
-		Index:      issue.Index,
-		Issue:      issue.APIFormat(),
-		Repository: repo.APIFormat(mode),
-		Sender:     issue.Poster.APIFormat(),
-	}); err != nil {
-		log.Error("PrepareWebhooks: %v", err)
-	} else {
-		go models.HookQueue.Add(issue.RepoID)
-	}
+	notification.NotifyNewIssue(issue)
 
 	return nil
 }
@@ -149,13 +143,3 @@ func AddAssigneeIfNotAssigned(issue *models.Issue, doer *models.User, assigneeID
 
 	return nil
 }
-
-// AddAssignees adds a list of assignes (from IDs) to an issue
-func AddAssignees(issue *models.Issue, doer *models.User, assigneeIDs []int64) (err error) {
-	for _, assigneeID := range assigneeIDs {
-		if err = AddAssigneeIfNotAssigned(issue, doer, assigneeID); err != nil {
-			return err
-		}
-	}
-	return nil
-}
diff --git a/services/pull/pull.go b/services/pull/pull.go
index 959da67405..8e6110ac36 100644
--- a/services/pull/pull.go
+++ b/services/pull/pull.go
@@ -11,14 +11,21 @@ import (
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/log"
 	api "code.gitea.io/gitea/modules/structs"
+	issue_service "code.gitea.io/gitea/services/issue"
 )
 
 // NewPullRequest creates new pull request with labels for repository.
-func NewPullRequest(repo *models.Repository, pull *models.Issue, labelIDs []int64, uuids []string, pr *models.PullRequest, patch []byte) error {
+func NewPullRequest(repo *models.Repository, pull *models.Issue, labelIDs []int64, uuids []string, pr *models.PullRequest, patch []byte, assigneeIDs []int64) error {
 	if err := models.NewPullRequest(repo, pull, labelIDs, uuids, pr, patch); err != nil {
 		return err
 	}
 
+	for _, assigneeID := range assigneeIDs {
+		if err := issue_service.AddAssigneeIfNotAssigned(pull, pull.Poster, assigneeID); err != nil {
+			return err
+		}
+	}
+
 	if err := models.NotifyWatchers(&models.Action{
 		ActUserID: pull.Poster.ID,
 		ActUser:   pull.Poster,