Oxygen masks deploy on Las Vegas-bound flight

Authorities say an electrical problem aboard a Southwest Airlines flight caused oxygen masks to deploy as the Las Vegas-bound plane began its final approach.

The plane from Kansas City landed safety Thursday evening and parked away from the terminal as emergency personnel responded.

Lt. Loren Napier says the 116 passengers and crew left the plane unharmed and were bused to the terminal.

Authorities say passengers complained of an odor like pepper spray at the back of the plane

Airport spokesman Chris Jones says the plane's crew reported the smell about 20 minutes before it landed, just before 6 p.m.

A Southwest West spokeswoman says the airline is investigating.