By Nayera Abdallah, Jana Choukeir and Eman AbouhassiraDUBAI, July 16 (Reuters) - Iran and the United States exchanged intensifying fire on Thursday in a week-long escalation that has largely unraveled last month's truce, while Tehran disputed President Donald Trump's claim that a U.S. citizen had been released.For the first time since a memorandum of understanding paused fighting last month, the United States launched two big waves of air strikes in a single day on Wednesday, mostly on targets near Iran's southern coast, and kept firing on Thursday.

By Enas Alashray, Tala Ramadan and Yomna EhabCAIRO/DUBAI, July 15 (Reuters) - The U.S. launched two waves of attacks on Iran's coastal defenses and missile sites on Wednesday…

The United States intensified its strikes targeting Iran early on July 16, hitting targets further north as American forces also fired into a ship it accused of trying to break…

Iran and the United States exchanged intensified fire, testing truce limits. The US launched air strikes on southern Iran, and Iran responded with missiles. Washington blockaded…