Iconic New York City landmarks including the Empire State Building dimmed their lights in honor of two New York Police Department officers who were ambushed and killed.

The lights dimmed from 9 p.m. to 9:05 p.m. Tuesday. Other buildings scheduled to participate included the Chrysler Building, One World Trade Center, 30 Rockefeller Plaza, Four Times Square and One Bryant Park.

Officers Wenjian Liu and Rafael Ramos were shot while in their patrol car on Saturday. The gunman claimed he was retaliating for the police-involved deaths of Eric Garner in New York and Michael Brown in Ferguson, Missouri. He later shot himself.

Mayor Bill de Blasio led a moment of silence for the men earlier Tuesday at City Hall.

(AP)