A group of ex-American political and military officials warned Trump on war against Iran.

MojNews-A group consisting of ex- American admirals, generals, ambassadors and senior government executives voiced deep concern Friday over the current escalation with Iran

"A war with Iran , either by choice or miscalculation, would produce dramatic repercussions in an already destabilized Middle East ," said the group in a letter addressed to U.S. President Donald Trump .

Signed by 76 people, the letter was published Friday by the War on the Rocks website.

It came hours before Trump's announcement that 1,500 additional U.S. troops will be sent to the Middle East amid heightened tensions between Tehran and Washington.

A war would "drag the United States into another armed conflict at immense financial, human and geopolitical cost", the letter warned.

It said lack of direct communication between the two countries' political and military leaders only increases the possibility of a miscalculation resulting in unintended military conflict.