A helicopter crashed Thursday into the Hudson River just off Manhattan, authorities said. Six people were killed in the incident, an Associated Press source said. The fire department said it received a report of a helicopter in the water at 3:17 p.m. Videos posted on social media showed the aircraft mostly submerged, upside down in the water. The fire department said it had units on scene performing rescue operations. Multiple rescue boats were seen on video circling the aircraft. MORE: https://www.wthr.com/article/news/nation-world/new-york-city-hudson-river-helicopter-crash/507-9ad6ac56-5397-4a5a-832a-9c97c7d46f14