Police in New York City say a man has fatally stabbed his step-father, his ex-girlfriend and her mother, before running over a pedestrian, in a 28-hour rampage in the city.
The man, believed to be Ukrainian-born, was armed with five knives.
Four other people were also knifed but survived the attacks.
He was finally arrested on a train after an all-night manhunt, police said.
Police said the suspect had stabbed three people to death, hijacked two cars, ran over a pedestrian and attacked several others in the violent spree which covered three New York City boroughs.
Police described the suspect as an unemployed drug user with 10 previous arrests, mostly linked to graffiti and drugs.