man carrying a rifle entered a Macy’s store at a mall in Washington state, shot dead four women and a man, and vanished into the night, police said.

Authorities believe only one person fired the shots at Cascade Mall in Burlington on Friday night.

A search is underway for an armed man who headed toward Interstate 5 after the attack, said Sgt. Mark Francis, a spokesman for the state patrol.

Francis released a blurry surveillance picture of a man described as the suspect. His motive or relationship to the victims, if any, are unclear, he said.