A police officer and at least five other people have died in a “furious” gun battle in Jersey City, in the state of New Jersey, US media report.
Shooting erupted in the Greenville neighbourhood, which is just across the Hudson River from New York City.
A motive for the incident has not yet been established. Authorities say they do not believe it was a terror attack.
Local media report the shooting began at a shop where two suspects had barricaded themselves in.
Initial reports indicated that three people in the shop had been killed during the ensuing shootout, along with the two suspected gunmen.
Jersey City Mayor Steven Fulop told local media two other police officers had also been wounded, including one who was shot in the shoulder.