A Hampton Bays resident eating lunch in his kitchen was suddenly confronted by two armed robbers who tied him up before taking off with valuables and the family BMW Thursday afternoon, Southampton Town police said.

Bound by tape, the victim made his way outside the house and was trying to free himself when a family member arrived and called police, authorities said.

Police did not detail what street the home invasion occurred on, but said the victim was home alone and told police he didn’t hear the two robbers coming in shortly after 12:30 p.m.

They pointed their guns at him and demanded to know the layout of the house and locations of valuables, police said. For about a half-hour, the victim could hear the two home invaders going around the house, then leave in what sounded like two vehicles, police said.

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About 1:45 p.m., a family member returned home and called police. The victim was not physically injured, police said.

The robbers took money, a safe, jewelry, electronics and a 2009 BMW, which was abandoned 2 miles from the house and found about 5 p.m., its engine still running, police said.

Detectives said the pair may have been near an M&T Bank ATM at 248 Main St. in Center Moriches about 2:09 p.m.

One suspect wore a dark hooded sweatshirt covering the top of his head and much of his face, police said. He was about 5 feet, 8 inches tall and had a slim build, police said. A detailed description of the other suspect was not released.

Detectives said anyone with information could call 631-728-5000 or the crime tips hot line at 631-728-3454.