Two people were killed and dozens more injured after a gunman opened fire at a university party in Dallas, Texas.

Hundreds of students were reportedly gathered at The Party Venue in Greenville to celebrate the homecoming – the start of a new term – at Texas A&M Commerce College.

It is understood around 750 people were in the building when someone with a semi-automatic rifle opened fire. Police have said authorities are currently still looking for the shooter. Police were called at around 3.15am local time in Texas.

According to reports, two people have died and  Graphic footage of the aftermath posted on social media showed several injured people on the ground inside the venue with others running away from the building.

Local media report at least 20 people were shot and officials said three air ambulances took some victims to a trauma hospital.

Police responded to reports of a mass shooting at 3.15am local time. The university said in a statement: ‘Our thoughts and prayers are with the victims, families, and friends of those affected by this morning’s shooting in Greenville, Texas.’