A man and a woman ambushed two police officers eating lunch at a Las Vegas restaurant, fatally shooting them at point-blank range before fleeing to a nearby WalMart where they killed a third person and then themselves in an apparent suicide pact, authorities said Sunday.

The shooters walked into CiCi’s Pizza and gunned down Officers Alyn Beck (41) and Igor Soldo (31) Las Vegas police officials said. One of the officers was able to fire back before he died, but it’s unclear if he hit the suspects, Sheriff Doug Gillespie of the Las Vegas Metro Police Department said at a news conference Sunday afternoon.

One of the shooters yelled, “This is a revolution,” but a motive remains under investigation, Las Vegas police spokesman Larry Hadfield told The Associated Press. He added that “we don’t know anything about the suspects yet.”

After shooting the officers, the suspects fled to the WalMart across the street, where they killed a person inside the front door and exchanged gunfire with police before killing themselves, police said.

The female suspect shot the male suspect before killing herself, Mr. Gillespie said. The victim’s identity hasn’t been confirmed, and the suspects’ names haven’t been released.

Both officers were pronounced dead at University Medical Center. Mr. Beck had been with the department since 2001 and leaves behind a wife and three children. Mr. Soldo had been with the force since 2006 and is survived by a wife and baby, police said.

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