India, April 11 -- A helicopter crashed into Manhattan's Hudson River on Thursday, killing all six people on board. While the cause of the crash is unclear, a former combat helicopter pilot, Jesse Matchey, told News Nation that it looks like a case of mast bumping.

In videos posted on social media, the chopper could be seen breaking midair before crashing upside-down into the river. The New York Fire Department said it received a report of the crash at 3:17 PM All six people aboard were killed, a law enforcement official told The Associated Press.

"Due to a helicopter crash in the Hudson River, in the vicinity of the West Side Highway and Spring Street, expect emergency vehicles and traffic delays in the surrounding areas," the NYPD sai...