By CBS3 Staff

KING OF PRUSSIA, Pa. (CBS) — At least one person was seriously injured in an elevator accident at a King of Prussia apartment building Monday night. Chopper 3 was over the building at 251 West Dekalb Pike.

READ MORE: Police: 2 Teens In Car Shot At Red Light In Philadelphia's Olney Neighborhood

Authorities say the elevator dropped several floors with three people inside at the time. Rescue teams initially rescued one person who was suffering from a broken leg.

READ MORE: 14 Arrested On More Than 120 Charges Related To NorthPak Gang Violence In Wilmington

Two others were then rescued, according to officials, including one person who was suffering from serious injuries.

There is no word on what caused the elevator to drop.

MORE NEWS: Wawa, 2SP Brewing Company Team Up For Sunfest Strawberry Lemonade Shandy Beer

Stay with for updates on this developing story.