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'Airman shot commander' in murder-suicide at US air base

An airman shot his commander dead in an apparent "murder-suicide" at a US air base in Texas, the Associated Press has reported, citing an unnamed official.

The FBI is leading the investigation at San Antonio's Lackland Air Force Base, which was placed under lockdown while deputies explored the site's buildings in response to reports of the shooting.

Brig. Gen. Robert LaBrutta said two handguns were found near the bodies of the men and confirmed the shooting was not an act of terrorism.

Bexar County Sheriff's Office tweeted updates of the shooting while it remained active:

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Texas floods close roads and knock out power

Dozens of roads have been rendered impassable in San Antonio and surrounding county as heavy rain caused floods across central Texas.

The floodwater also knocked out power supplies to some 12,000 customers, according to to CNN.

A motorway is part submerged under floodwater in San Antonio, Texas Credit: APTN

The National Weather Service (NWS) has flood warnings in force for five rivers in the San Antonio area and is warning drivers in affected areas to stay put.

Cars stranded in the floodwater

A tornado briefly touched down in the suburb of Live Oak causing minor damage to buildings and trees but is no longer a threat, the NWS reported.

A bus is half submerged under the flood water Credit: APTN

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1,000 evacuated from San Antonio airport

Two terminals have been evacuated in San Antonio airport after authorities were alerted to "a very specific bomb threat." Airport spokesman Rich Johnson said:

All flights in and out are on hold. All aircraft are being held away from the terminal.

Jonson said about 1,000 people have been evacuated. No flights have been diverted, but six or seven flights that landed or were preparing to take off were ordered away from the terminal.