American pastor Andrew Brunson was released from prison in Turkey on Wednesday after being imprisoned for more than a year and a half on terrorism charges, according to the U.S. State Department.

The details: Secretary of State Mike Pompeo called it a "positive development," but added, "it is not enough. We have seen no credible evidence against Mr. Brunson, and we call on Turkish authorities to resolve his case immediately in a transparent and fair manner." Axios has previously reported that senior Trump administration officials assume Turkish President Recep Tayyip Erdogan is using Brunson to force the U.S. to extradite Fethullah Gulen, a Turkish dissident living in Pennsylvania who Erdogan believes has been organizing a revolution against him.