At least two people died and other 24 have been injured in a mass shooting at the Route 91 Harvest festival in Las Vegas.

A gunman opened fire at an open-air country music festival at the Mandalay Bay Hotel on Las Vegas Strip.

Hundreds of people fled the scene and the sound of what appeared to be prolonged automatic gunfire could be heard on videos posted on social media.

According to police, a suspect “was down”. There are reports of at least one other incident on the Las Vegas Strip.

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Parts of the area were shut down as armed police arrived at the scene of the attack on the Route 91 Harvest festival.

The shooting took place at around 22:30 local time. Witnesses reported that hundreds of shots were fired.

Some flights have been diverted from Las Vegas McCarran airport while the incident continues.