An LAPD investigator collects a knife stuck in a tree as they look for evidence at an apartment building located at the corner of Washington Boulevard and Buckingham Road in Lafayette Square.

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Two LAPD detectives wounded in ambush

An LAPD investigator collects a knife stuck in a tree as they look for evidence at an apartment building located at the corner of Washington Boulevard and Buckingham Road in Lafayette Square. (Al Seib / Los Angeles Times)

Evidence is examined in a van near the shooting scene. A suspect apparently confronted a woman with her baby shortly after an early morning shooting of two LAPD detectives. (Al Seib / Los Angeles Times)

An officer examines the crime scene. (Al Seib / Los Angeles Times)

SWAT officers work to clear a neighborhood near West Washington and South Rimpau boulevards. (Al Seib / Los Angeles Times)

SWAT officers and a police dog prepare to search a neighborhood for the shooter. (Al Seib / Los Angeles Times)

Police officers guard the area surrounding the LAPD’s Wilshire Division station, where a gunman fired on two undercover detectives. (Irfan Khan / Los Angeles Times)

Crime scene investigators examine the car that two LAPD detectives were in when a gunman fired on them outside the LAPD’s Wilshire Division station. (Irfan Khan / Los Angeles Times)

Neighbors gather to look at the shot-up car that two LAPD detectives were in when they were ambushed outside the police department’s Wilshire Division station. The detectives suffered minor injuries and returned to duty later in the morning. (Irfan Khan / Los Angeles Times)

A Los Angeles County Sheriff’s Department SWAT team travels on Rimpau Boulevard in the Mid-City area during the search for a gunman who fired at two LAPD detectives. (Irfan Khan / Los Angeles Times)

LAPD SWAT officers search homes in the 4800 block of St. Elmo Drive. (Irfan Khan / Los Angeles Times)

A police officer stops traffic at a roadblock at Venice and Redondo boulevards in L.A.'s Mid-City neighborhood as the LAPD searches for a gunman who opened fire on two detectives outside the Wilshire Division station. (Al Seib / Los Angeles Times)

The scene outside the LAPD’s Wilshire Division station, where two detectives were attacked by a gunman early Tuesday morning. (Irfan Khan / Los Angeles Times)

LAPD officers talk to a man at a roadblock on Venice Blvd. as police search for a gunman who opened fire on two detectives outside the Wilshire Division station. (Irfan Khan / Los Angeles Times)

LAPD vehicles dot Venice Boulevard in L.A.'s Mid-City neighborhood as officers search for a gunman who opened fire on two detectives outside the Wilshire Division station. (Irfan Khan / Los Angeles Times)

A motorist passes LAPD officers on Venice Boulevard as they search for a gunman who opened fire on two detectives outside the Wilshire Division station. (Irfan Khan / Los Angeles Times)

Officers check maps near the shooting scene. (Gary Friedman / Los Angeles Times)

LAPD motorcycle officers stream through a roadblock on Venice Boulevard to join the search for a gunman who opened fire on two detectives outside the Wilshire Division station. (Irfan Khan / Los Angeles Times)

A police officer holding a shotgun stops traffic at a roadblock as the LAPD searches for a gunman who opened fire on two detectives outside the Wilshire Division station. (Al Seib / Los Angeles Times)

Venice Boulevard in L.A.'s Mid-City neighborhood is empty as police officers search for a gunman who opened fire on two detectives outside the Wilshire Division station. (Al Seib / Los Angeles Times)