EL PASO: At least 15 people were killed in a mass shooting Saturday at a Walmart store in Texas, US media reported.

The shooting resulted in "between 15 and 20" deaths, Texas Attorney General Ken Paxton told CBS News.

Meanwhile, NBC News cited law enforcement sources as saying that 19 people were killed and 40 wounded.

Law enforcement sources told ABC News that at least 18 people were killed and dozens injured.

A white male suspect in his 20s is in custody, police said.