Watch: Cigarette addict caught smoking in plane bathroom threatens to kill everyone on board

Video taken during a Southwest Airlines flight Saturday shows a woman screaming and making threats toward passengers' lives.

The airline said the woman was found smoking in the plane's lavatory after tampering with the smoke detector, according to the Washington Post. Accused of subsequently pulling out an oxygen mask, the woman can be seen and heard demanding the plane be stopped or else she would kill all passengers and crew.

"I swear, if you don't f—ing land, I will f—ing kill everybody on this f—ing plane," the woman says to a flight attendant. More chaos ensued.

The crew eventually complied and landed in Sacramento, where deputies were waiting on the ground to make their arrest.