Retired General Anthony Zinni, the Trump administration's envoy working to resolve the Gulf region's diplomatic dispute, has resigned from his role at the State Department, according to CNN.

Two State Department officials told CNN that Zinni left because he felt he had reached a dead-end, believing there was no forward movement on resolving the stalemate between Qatar and its Gulf neighbors. The sources claim Zinni did not depart because of bad blood with other administration officials. Zinni confirmed in an email to CNN that the sources' characterizations of his departure were correct. "I did not think my services were needed," he said.

Gulf nations, including Saudi Arabia, the United Arab Emirates, Egypt, Bahrain and Yemen, severed ties with Qatar in 2017 over its support for terrorist organizations such as the Muslim Brotherhood.