The scene at First Baptist this afternoon (Photo: KSAT)

A gunman reportedly opened fire at a church in Texas, leaving multiple victims, The Mirror reported.

The incident took place at the First Baptist Church in Sutherland Springs, a small community south-east of San Antonio.

According to witnesses, a man walked into the church at around 11.30am local time.

The shooter is now believed to be dead.

Unconfirmed reports on social media claim that more than a dozen people have been injured during the shooting, though it is not clear yet how serious their injuries are.

This is a developing story and will be updated as further reports are received.