Police on Long Island are investigating three armed home invasions in the past week, the latest of which in Glen Cove ended when the assailants allegedly pistol-whipped a victim, authorities said.

Gregory Czaplichi, 18, and 17-year-old Nicholas Bollar, both of Glen Cove, were arrested and charged with burglary after Glen Cove city police said the suspects and two others broke into the victim’s Coles Street home shortly before 10 p.m. Monday.

The suspects, who were armed with handguns, demanded money before allegedly assaulting the victim, police said. Detectives, who are continuing the investigation, apprehended the two teens hours later and believe at least one of the suspects knew the victim. The other two remain at large.

Suffolk County police are separately investigating two more armed home invasions four days and five miles apart from each other in Wyandanch and North Amityville a week after two similar cases in those areas.

In the first case, three men armed with handguns forced their way into a trailer on Horseshoe Court in North Amityville and demanded money from the victim inside at 8:47 a.m. Tuesday, May 20, police said.

The suspects fled with cash, a BB gun and an iPhone. The victim suffered a bruised head but refused medical attention.

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Then at 9 p.m. Friday, May 23, suspects armed with guns forced their way through the front door of a house on State Avenue in Wyandanch, where they stole money before they fled. There were no reported injuries in the second case.

No arrests were made or descriptions were available in either of the Suffolk cases. First Squad detectives are continuing the investigation into those incidents.