An armed student rallies in support of the Houthi-imposed naval embargo against Saudi Arabia in Sanaa, Yemen, Wednesday. Hundreds of students gathered at Sanaa University to support the move. Photo by Yahya Arhab/EPA

July 23 (UPI) -- The Houthis in Yemen claimed responsibility for two attacks on Saudi oil tankers in the Red Sea with missiles and drones.

The Iran-backed Houthis, who have been fighting for control of Yemen, claimed on Wednesday that they had hit the Encelia and the Layla oil tankers, which they said were violating their blockade of Saudi ships. They had announced the blockade on Monday.

Saudi Arabia's transportation authority confirmed the attack on the Encelia in a statement. It said there was a fire on board but the crew were all safe. It didn't mention the Layla.

Houthi military spokesperson Yahya Saree said the group promised to continue naval operations and would continue "enforcing the 'siege for a siege' equation," the BBC reported.