The U.S. State Department has approved the potential sale of more than 130 Abrams battle tanks, 20 armored recovery vehicles and other equipment, worth about $1.15 billion, to Saudi Arabia, the Pentagon said on Tuesday.

The approval coincides with Saudi Arabia leading a military coalition in support of Yemeni forces loyal to the exiled government of President Abed Rabbo Mansour Hadi who are trying to oust Iran-allied Houthi forces from the capital, Sanaa. Human rights groups have criticized the coalition's airstrikes because of the deaths of civilians.

The U.S. Defense Security Cooperation Agency, which implements foreign arms sales, said General Dynamics will be the principal contractor for the sale.