The API returns a 301 Moved Permanently status if the issue was
transferred to another repository. If
the issue was transferred to or deleted from a repository where the authenticated user lacks read access, the API
returns a 404 Not Found status. If the issue was deleted from a repository where the authenticated user has read
access, the API returns a 410 Gone status. To receive webhook events for transferred and deleted issues, subscribe
to the issues webhook.
Note: GitHub's REST API v3 considers every pull request an issue, but not every issue is a pull request. For this
reason, "Issues" endpoints may return both issues and pull requests in the response. You can identify pull requests by
the pull_request key. Be aware that the id of a pull request returned from "Issues" endpoints will be an issue id. To find out the pull
request id, use the "List pull requests" endpoint.