'You never know when it's going to be your last day': Brooklyn gunman walks up on 17-year-old, shoots him in chest in broad daylight. Teen later dies.

New York City police are looking for a gunman they said walked up on a 17-year-old male and shot him in the chest in broad daylight on a Brooklyn sidewalk Wednesday afternoon, authorities told WNBC-TV.

Graig Bassett was pronounced dead at a hospital, the NYPD added to the station.

What are the details?

Police released video of the shooting, WNBC said, adding that it shows a male dressed in black and wearing a black face mask walking across a street and weaving between cars until he gets up on a sidewalk. The station said he looks at someone, pulls a gun, aims, fires, and then runs off.

The shooting took place at Saratoga Avenue and Prospect Place around 4:50 p.m., police told WPIX-TV. A surveillance camera outside the Ya Ya Deli recorded the crime, WABC-TV reported. The victim lived less than a mile from the shooting scene, WNBC said.

There was no immediate word on whether the shooter and Bassett may have known each other or what led to the shooting, WNBC added. But WABC said police indicated a group of teens — possibly part of a juvenile robbery gang — had an argument outside the store before the shooting.

Anyone with information can call Crime Stoppers at 1-800-577-TIPS, WNBC noted.

'You never know when it's going to be your last day'

WABC said a small memorial now sits at the corner outside the deli.

"Lighting a candle for our friend, sad we lost our friend, but it's another day for us," a friend of Bassett told the station.

Neighbor Olivia Doughty added to WABC that "you never know when it's going to be your last day. That's really young, and I feel bad for the parents and what they're going through right now."

Mohamed Alzindani, who works inside the deli, told WABC that "it's sad to see somebody lose their life over what? Money? Women? What could be the problem to take somebody's life? It's very sad."

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