The US is sending additional troops to the Middle East during a sharp spike in violence between Israel and Hezbollah forces in Lebanon that has raised the risk of a greater regional war, the Pentagon says.

Pentagon press secretary Maj. Gen. Pat Ryder would provide no details on how many additional forces or what they would be tasked to do. The US currently has about 40,000 troops in the region.

The new deployments come after significant strikes by Israeli forces against Hezbollah targets inside Lebanon that have killed hundreds and as Israel is preparing to conduct further operations and the State Department is warning Americans to leave Lebanon as the risk of a regional war increases.