The Pentagon tomorrow will present plans to the White House to send up to 10,000 more troops to the Middle East, in a move to beef up defences against potential Iranian threats, US officials said.
The officials said no final decision has been made yet, and it's not clear if the White House would approve sending all or just some of the requested forces.
Officials said the move is not in response to any new threat from Iran, but is aimed at reinforcing security in the region.
They said the troops would be defensive forces, and the discussions include additional Patriot missile batteries, more ships and increased efforts to monitor Iran.
Tomorrow's meeting comes as tensions with Iran continue to simmer, and it wasn't clear if a decision would be made during the session.