TEHRAN — Iran has released two United States Navy patrol boats and 10 crew members who were described as “trespassing” in Iranian waters near a major naval base, state news media reported on Wednesday.

The Pentagon and the State Department said that one of the boats had experienced mechanical problems en route to Bahrain from Kuwait on a routine mission on Tuesday, and the Iranians appeared to have accepted that explanation.

The release was announced shortly before 10 a.m. on an Iranian state-run news channel, IRINN. “The detained U.S. Marines, after it was realized that their entry into Iran’s territorial waters was unintentional, and after the Marines apologized, were released into international waters in the Persian Gulf,” the channel reported, attributing the statement to the Islamic Revolutionary Guards Corps.