Police are searching for a gunman who opened fire inside a Walmart store in the early hours of Friday, killing four people before he was killed by police.
The shooting happened just after 2am in the parking lot of the Walmart in the town of North Bergen, NJ, near the New Jersey border.
Police said the gunman shot and killed four people in the shooting, and then opened fire on the officers.
He then drove away in his vehicle, police said.
Police in North Berge said that the suspect is a man in his 20s, about 5ft 10in tall and has black hair and was wearing a dark jacket.
Police did not say if he has a criminal record.
The incident happened just hours after a similar incident in which a man opened fire in a Walmart parking lot in a shopping mall in California, killing six people before being shot dead by police on the scene.
Police have not released the names of the dead people, or the motive for the shooting.