(CNN)Authorities said Thursday afternoon after two planes crashed in mid-air at the City Fire Department's Watsonville Municipal Airport. , confirmed that there were "multiple casualties". Section chief Rudy Lopez told CNN.
A single-engine Cessna 152 and a twin-engine Cessna 340 collided during their final descent into the airport, according to a Federal Aviation Administration statement. There was one person on board the Cessna 152 and two on the Cessna 340, the FAA said in a statement.
No one was injured on the ground, he added, the FAA.
The city of Watsonville is about an hour south of San Jose.
It is not clear what caused the two planes to collide.
This story is a work in progress and will be updated.