Tehran ? Iranian president Mahmoud Ahmadinejad on Tuesday proposed a swap of Iranians in U.S. prisons for three American hikers being held in Tehran.

Ahmadinejad said in interview with state TV that there were ongoing negotiations about exchanging the hikers for several Iranians jailed for years in the United States.

“There are some talks under way to have an exchange, if it is possible,” he said. “Recently they (the U.S.) have sent messages, we answered to bring them (the Iranians), to bring these people (the hikers). We are hopeful that all prisoners will be released.”

Ahmadinejad did not mention any specifics but in December Iran released a list of 11 Iranians it says are being held in the U.S. — including a nuclear scientist who disappeared in Saudi Arabia and a former Defense Ministry official who vanished in Turkey. The list also includes an Iranian arrested in Canada on charges of trying to obtain nuclear technology.