Members of the LAPD SWAT Team and other officers descended on the 2200 block of Aaron Street west of Glendale Boulevard at about 3 PM. Residents were left to wonder what was going on as members of the SWAT team were seen standing in yards, and a police helicopter hovered overhead. An officer with the team said they were helping serve a warrant at a home on the block. There had been no shooting, he said. An LAPD spokeswoman said she had no information on the operation.