ERBIL, Kurdistan Region of Iraq – The United States and Iran continued exchanging fire Tuesday as Washington reimposed a naval blockade on Iranian shipping in the Strait of Hormuz and carried out strikes in southern Iran, while Tehran claimed attacks on several US-linked bases across the region.

Washington and Tehran traded daily strikes for almost a week, leading US President Donald Trump on Wednesday to say that the US-Iran peace deal “is over,” merely 21 days after the memorandum of understanding was signed.

The US Central Command (CENTCOM) late Tuesday announced that it had “resumed the naval blockade against vessels transiting to and from Iranian ports.”

Earlier, the US forces said it had also launched “an additional round of strikes against Iran.”

Since the start of the conflict in late February, Tehran has restricted access to the Strait of Hormuz, a key waterway responsible for the transport of roughly 20 percent of the world’s oil.

The US had repeatedly stressed free navigation in the vital waterway as one of its main demands before the MoU was reached with Iran, but Trump on Monday announced that Washington will now protect ships transiting Hormuz in return for charging 20 percent on all cargo shipped.

Iran’s Islamic Revolutionary Guard Corps (IRGC) said on Tuesday it had “destroyed several weapons storage facilities” and parts of “enemy vessels and aircraft” at Bahrain's Sheikh Isa Air Base in an attack which involved missiles and drones.

The IRGC also claimed to have “destroyed or damaged” several US MQ-9 drones by striking the drone ramp at Kuwait's Ali Al Salem Air Base.

US strikes have largely targeted southern Iran near the Strait of Hormuz, while Iran has resumed targeting countries hosting US military bases and also attacked vessels for allegedly failing to provide prior notification before transiting the waterway.

The retaliation “will continue as long as the US crime continues,” the IRGC said, warning that “not a drop of oil and gas will be exported from the region” as long as US forces remain in the region.

Amid the tensions, Iranian lawmakers have reportedly introduced a bill related to the Strait of Hormuz at the parliament.