Secretary of State Marco Rubio is traveling to the Middle East to reassure Gulf allies about the Iran deal aimed at ending the war, BBC News reported on Wednesday.

BBC correspondent Daniel Bush, who is accompanying Rubio, reported that the trip is intended to address regional concerns and maritime security. Bush described the stops as a critical component of the diplomatic push.

The Iran deal is designed to end the conflict between the United States and Iran, according to the BBC report. The specific countries and timing of the stops were not disclosed.