US sends submarine to Middle East as tensions grow

The US has sent a guided missile submarine to the Middle East, as tensions grow in the region.

Defence Secretary Lloyd Austin also said an aircraft carrier which was already heading to the area would sail there more quickly.

The move comes in response to fears of a wider regional conflict, after the recent assassination of senior Hezbollah and Hamas leaders.

It signals the US's determination to help defend Israel from any attack by Iran - with Mr Austin saying US would "take every possible step" to defend its ally.

Iran is being closely watched for any indication of how and when it might respond to the assassination of Hamas's top political leader Ismail Haniyeh in Tehran on 31 July.