Two Men Are Killed in Separate Hit-and-Runs in the Bronx Two men were killed by hit-and-run drivers less than an hour apart and a few miles of each other in the Bronx on Friday night and early Saturday, the police said. Another man was critically injured in the second accident. That driver fled but was arrested after his car collided with a Fire Department vehicle that was on its way to the accident site, according to the police. The first accident occurred about 11:20 p.m. Friday on Webster Avenue near East Gun Hill Road, when a maroon Nissan Maxima traveling north struck a bicyclist heading in the same direction, the police said. The bicyclist, David Ellis, 18, was thrown from his bike and landed in a southbound lane of Webster Avenue, where he was hit by a Ford Explorer. The driver of the Explorer stopped and remained at the site. The driver of the Nissan and a passenger abandoned the vehicle. "Two male occupants fled," a police official confirmed. Mr. Ellis was pronounced dead at Montefiore Medical Center. On Saturday, his godmother, Jacqueline Morris, 63, said his grieving family was especially upset that neither of the men in the Nissan made any effort to summon help. "Those cowards hit him and ran," Ms. Morris said in a phone interview. His mother is devastated; that's her baby. Ms. Morris described Mr. Ellis as a tall, athletic, good-natured youth who loved to wrestle and play football and was "strutting like a peacock" as he made the transition to manhood. She added that Mr. Ellis, known by his middle name, Troy, had stopped at her apartment before going out on Friday night and had had a meal with her daughter, granddaughter and grandson. "They broke up a family," Ms. Morris said. I was there when he was born. The second accident occurred just after midnight, when two men crossing the Grand Concourse near East 170th Street were struck by a 2011 Honda driven by a man who fled on the Grand Concourse, the police said. The pedestrians, who were not immediately identified, suffered severe bodily trauma, the police said. One of the men, who was 42, was pronounced dead at Bronx-Lebanon Hospital Center. The other man, who is 34, was taken to Lincoln Medical and Mental Health Center, where he was reported in critical condition. The police said the driver of the Honda drove north five blocks and turned right onto Mount Eden Avenue, where his car collided with a Fire Department vehicle that was rushing to aid the two men who had just been struck. The driver, who was not immediately identified, was arrested there, and charges were pending, the police said. In Manhattan, meanwhile, a 50-year-old man was struck by a taxi at Broadway and Prince Street just after 4 a.m. Saturday, the police said. The cabdriver remained at the accident site, and the man was reported to be in stable condition.