A California man is facing federal charges after he allegedly tried to choke a flight attendant and “said he was going to kill everybody” while on board a Frontier Airlines flight to San Francisco that had to be diverted on Monday,

A California man could face up to 20 years in prison after attempting to choke a flight attendant and "kill everybody" on a Frontier Airlines flight.

ITA Airways said, “Our colleague, Gabriella Cario, was off duty when she died last Saturday in Reggio Calabria. She was returning home as a passenger and died on the plane before the flight from Reggio Calabria to Rome took off.”

Multiple flight attendants have, over the last year, sounded the alarm over a sharp increase in passengers who get belligerent, resistant of rules or outright violent. JetBlue Airways (JBLU) flight attendant and president of a Transportation Workers Union Local 579 branch Tyesha Best once described to TheStreet how a passenger who was told he could not use the lavatories during turbulence peed in an empty bottle and started waving it around while calling the flight attendants onboard the c-word.

A Frontier Airlines flight to San Francisco was diverted after a passenger allegedly began acting erratically and shouted, “This airplane is going down!”

A man is facing federal charges after allegedly choking a Frontier Airlines flight attendant and screaming that a San Francisco-bound plane was “going down” before threatening to kill all the passengers on board.