WASHINGTON - A group of nearly 200 retired US military generals and admirals have sent a letter to Congress, urging lawmakers to reject the Iran nuclear accord.

The letter was sent to Congress on Wednesday by retired generals and flag officers from every branch of the US armed forces, including military officers who served in the White House, under Democratic and Republican administrations.

Retired Lt. Gen. Jerry Boykin, who was deputy undersecretary of defense under George W. Bush, is among the signatories of the letter. The letter described the agreement as a threat to US national security as well as to Washington’s interests and allies in the Middle East.

“The agreement will enable Iran to become far more dangerous, render the Mideast still more unstable and introduce new threats to American interests as well as our allies,” the letter states.

It is the latest petition that called on American lawmakers to support or reject the nuclear deal.

Letters have already come from rabbis, nuclear scientists, arms-control and nuclear nonproliferation experts and retired generals who support the deal.

Earlier this month, 36 retired generals and admirals published an open letter in the Washington Post in support of the agreement.

US President Barack Obama says he is confident that the agreement between Iran and the world powers will go forward despite opposition from Republican lawmakers in Congress.

Congress will vote on the July accord, known as the Joint Comprehensive Plan of Action, in September.