Syria’s new authorities said on Thursday that an American citizen who had been imprisoned while Bashar al-Assad was in power had been found outside Damascus and handed over to the rebel group that now controls the capital.

In interviews with international news media, the man appeared to identify himself as Travis Timmerman, an American who is believed to have gone missing from Budapest, Hungary, this year. In a video aired on Thursday by the news channel Al Arabiya, someone is heard asking the man if his name is Travis Timmerman. The man says, “That’s right.”

Hisham al-Eid, the mayor of Al-Thihabiyeh, a poor, partly rural town east of Damascus, said that the man had been found on Thursday morning on a main road. He was barefoot and cold but otherwise seemed to be in good health, Mr. al-Eid said.

The man told reporters that he had entered Syria from Lebanon on a Christian pilgrimage, and had been detained for several months. He said he had received food and water while in detention, and was allowed to go to the bathroom three times a day.

In another video posted by Al Arabiya, the man, wearing a beard and a gray hooded top, said that he had been held in a cell alone. When asked how he was freed, he said that on Monday, someone “took a hammer and they broke my door down.”

It was not immediately clear where the man had been held. The fall of the authoritarian Assad regime over the weekend to rebel forces led by the Islamist group Hayat Tahrir al-Sham has prompted the release of many prisoners held in a sprawling network of detention centers operated by the former government.

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