Police in the US say a gunman has murdered more than 20 people at a Baptist church in Texas.

At least 20 others were injured in the attack in Sutherland Springs, 30 miles south east of San Antonio.

According to the local sheriff, the man walked into a service and opened fire - he was later killed.

President Trump, who's on a tour of Asia, has tweeted saying "May God be with the people of Sutherland Springs, Texas."

#BREAKING Children are among those killed during a mass shooting in Texas today https://t.co/hCGAKW2J1g

— nzherald (@nzherald) November 5, 2017