A shooting at a military base in San Antonio, Texas, has left at least two dead, authorities have said. Bexar County Sheriff's Office spokesman James Keith told MSNBC that the attack appeared to be a murder-suicide.

The shooting at Lackland Air Force base also left several injured and police have closed off the base's Medina Annex. Lackland Air Force Base is approximately 10 miles (16km) south-west of San Antonio and is home to a US Air Force boot camp.

Sydney Spalding said he was heading to see a friend graduate from the Air Force when the base went under lockdown. He told the news network: "We were driving around looking for somewhere to park and an announcement came on all over base saying there was an active shooter in building 147.

"You saw different airmen running in uniform and people spreading out. We were still in the car debating if we could leave. We parked and were trying to find somewhere to hide out and was pulled into a dark building to hide out."