Suffolk County police detectives are combing through surveillance tapes to identify the person who shot a Huntington Station man near his home early Saturday.

Nelson Hernandez, 22, was struck in the back by a bullet while he was walking alone on West Hills Road near President Street about 1:35 a.m., said Det. Lt. William Burke of the Second Squad.

After he was shot, Hernandez ran toward the three-way intersection at New York Avenue, where first responders -- prompted by a 911 caller -- found him lying on the sidewalk, Burke said.

Hernandez was taken to Huntington Hospital, where he was in serious condition, Burke said.

Detectives Saturday afternoon were watching footage from surveillance cameras near the scene while they waited to speak with Hernandez, who underwent surgery, police said.

"There may have been some kind of dispute sometime earlier," Burke said. "Obviously someone was having a dispute with him because he shot him, but we don't know the background on that yet."

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Burke said the surveillance videos that detectives have viewed do not show a good enough image of the shooter or shooters.

"There may have been more than one shooter . . . and we believe there was more than one shot fired," Burke said. "He was shot in the back, so it could be because he was running away."

The investigation is ongoing, said Burke, who urged anyone with information to call the Second Squad at 631-854-8252, or call Crime Stoppers anonymously at 800-220-TIPS.