There was heavy police presence in the Gaslamp Quarter at night after a 21-year-old woman celebrating her birthday in the popular party area was fatally shot, it was reported Monday.The gunman fired into a crowd that was watching some sort of fight. Lakiesha Mason, who was celebrating her 21st birthday with friends, was mortally wounded and died a half hour after the attack, and two men were injured.San Diego police Sgt. David Jennings told The San Diego Union-Tribune that more officers were out in force in the Gaslamp Quarter district of bars and nightclubs Sunday night because of the deadly shooting.Police Sunday appealed to witnesses who may have used cell phone cameras to photograph a closing-time fight outside a bar where the 21-year-old woman was shot. Police believe photographs of the scene could provide detectives with images of the shooter.He was described as a thin black man with a medium complexion, about 21 years old and 6 feet 1 inch tall, with hair about a half-inch long; he was wearing a black, hooded sweatshirt and dark jeans.San Diego police Lt. Terry McManus told the newspaper that Mason "just happened to be in the wrong place at the wrong time. Sadly, she was shot and killed on her 21st birthday."Two men, 26 and 34 years old, were also wounded. Police withheld their names but said both are expected to survive.Police urged anyone with information or photos to call detectives at 619-531-2293 or Crime Stoppers at 888-580-8477.