A United Airlines spokesperson told Business Insider that "a small number of oxygen masks inadvertently deployed ... had a ...

dropping oxygen masks until they could figure out the problem. If a plane loses cabin pressure, the pilot has to bring the aircraft to a lower altitude to keep crew and passengers safe.

Videos tweeted by passengers aboard the plane showed oxygen masks deployed inside the aircraft. The Boeing 737, which was carrying 166 passengers, landed safely. The aviation ministry said the ...

“However, donning the oxygen masks as an immediate action would have given both pilots immediate protection ... Every pilot’s ...