RIYADH (Reuters) - U.S. Central Command chief General Kenneth McKenzie said on Thursday it was talking to other countries about freedom of navigation in the Gulf and would work "aggressively" to find a solution to enable free passage.

The United States has beefed up its military presence in the Middle East over a perceived Iranian threat and is asking allies to help protect strategic waters off Iran and Yemen, following attacks on oil tankers in Gulf waters in recent months.