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       16-year-old killed in an after-school brawl over a girl After-school brawl over a girl turns deadly in New York.

       Seven Long Island teens were arrested Friday on gang assault charges in connection with the fatal stabbing of a high school student that was recorded by onlookers earlier this month.

       Prosecutors say the teens were involved in the Sept. 16 brawl in Nassau County which left 16-year-old Oceanside High School student Khaseen Morris dead They were arrested Friday.

       Earlier this week, Tyler Flach, 18, of Lido Beach, L.I., was charged with second-degree murder. He is being held without bail.

       Police have said between 50 and 70 teens watched the bloody brawl, and several recorded the fight on cell phones while doing nothing to help Morris.

       SUSPECT, 18, HELD IN MURDER OF NEW YORK TEEN WHO WAS FATALLY STABBED WHILE STUDENTS RECORDED ATTACK: COPS

       The victim’s sister told Newsday that she was comforted by the additional arrests.

       “People cannot do this to someone so good and think there’s not going to be any kind of justice,” Keyanna Morris, 30, told the paper.

       Tyler Flach, 18, of Lido Beach (top left) was charged with murder in the stabbing death of Khaseen Morris. Seven others, including Haakim Mechan, 19 (top center), Javonte Neals, 18 (top right), Marquis Stephens Jr., 18, Taj Woodruff, 17, Sean Merritt, 17 (bottom, from left to right) were charged with gang assault in the case. (Nassau County Police Department )

       Those arrested included 19-year-old Haakim Mechan, 18-year-old Marquis Stephens, 18-year-old Javonte Neals, 17-year-old Taj Woodruff and 17-year-old Sean Merritt, all of Long Beach.

       They all pleaded not guilty to second-degree gang assault at their arraignment Saturday in Hempstead.

       Two 16-year-olds also were charged with gang assault but were not named by police because of their age. Scott Gross, an attorney for one of the 16-year-olds, said his client “played no role” in the killing.

       LONG ISLAND HIGH SCHOOL STUDENTS RECORDED ATTACK INSTEAD OF HELPING STABBED TEEN WHO LATER DIED, COPS SAY

       Detective Lt. Stephen Fitzpatrick said at a news conference Saturday the fight at a strip mall near Oceanside High School started because Morris was with the ex-girlfriend of one of the suspects.

       Fitzpatrick said the suspects all took part in the attack on Morris.

       “Each one of them had an active role,” he said. “They came with the intention to seriously hurt him. Khaseen got killed as a result.”

       “It’s the first step toward justice,” Fitzpatrick said of the arrests, according to WPIX-TV.

       Morris’ funeral was being held Saturday.

       The Associated Press contributed to this report.