Three teenagers were killed and another one was injured during a shooting incident at a gas station in the US state of Texas over the Christmas weekend, police said.

The suspect, a 14-year-old boy, was arrested on Monday afternoon, Xinhua news agency quoted Police Chief Jeff Bryan in the Dallas suburb of Gar land as saying.

In a surveillance video of the shooting, which took place on Sunday night, the shooter got out of the passenger side of a pick-up truck, walked up to the front door and opened fire into the gas station convenience store from the doorway.

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Police said he fired more than 20 rounds from a .40 calibre pistol.

The shooter then got back into the pick-up and fled with a male driver, whom police said they are still searching for.

The victims were three boys aged 14, 16 and 17, police said.

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