Iran's president warned that the peace talks serve to help end the conflict but the nation is by no means surrendering.

Hostilities remain high in the Strait of Hormuz as the U.S. and Iran continue to exchange fire. CBS News' Wendy Gillette reports.

Iran has sent its response to the latest U.S. ceasefire proposal via Pakistani mediators and wants negotiations to focus on permanently ending the war, Iran’s state-run media said Sunday.

Iran has sent its response to the latest US proposal for ending the conflict that began at the end of February, according to state media. Follow for live updates.

Iran: Tehran presented its official response to the latest American proposal in the negotiations to end the war, Iranian state media reported on Sunday, providing few details on the content of the reply.

The U.S. is still waiting for Iran to formally respond to a proposed 14-point memorandum of understanding to end the war and open the Strait of Hormuz, which Washington submitted to mediators on Wednesday.

A U.S.-mediated ceasefire between Russia and Ukraine appeared under serious strain on Sunday, with both sides trading blame for weekend attacks.

The shaky ceasefire in the Iran war was tested again on Sunday when a drone set a small fire on a ship off the coast of Qatar, while the United Arab Emirates and Kuwait reported separate drones entering their airspaces.