A 48-year-old man was shot and seriously wounded early Thursday in a home-invasion-style robbery early Thursday in Central Islip that netted no proceeds, police said.

Three other residents -- identified by police as a mother, her 22-year-old daughter and 13-year-old son -- were in the home on Birch Street when three masked gunmen entered the house through a rear window just before 1 a.m., Suffolk County police said.

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The 22-year-old suffered a facial injury from being struck with the butt handle of a gun and required hospitalization, police said. The mother and son were both uninjured.

It is not known if the man is related to the other three residents, police said. Police said he was shot in the abdomen and was transported to Southside Hospital in Bay Shore.

A search was conducted by Third Squad detectives and a canine unit, but none of the suspects were found. Police said the trio all wore dark clothing and masks and said it was not clear how the suspects fled the scene. Witnesses did not report seeing a vehicle, police said.

The incident remains under investigation, police said.