A woman in California has died after her parachute failed to fully open as she was falling to the ground and it became tangled around her, police said.

The San Joaquin County Sheriff’s Office said the woman died on Saturday at the Lodi Parachute Center. The woman was not identified.

“What was reported to us from someone who witnessed the (incident)… was that the chute failed to fully open as she was coming down and it was heavily tangled around her,” the San Joaquin County Sheriff’s Office said.

Police did not provide a cause of death. They said the woman was “very experienced.”

The FAA said they are investigating the incident, but focusing on the parachute rigging.

“Federal Aviation Administration investigations of skydiving events are limited to inspecting the parachute rigging. The FAA does not investigate to determine the cause of the event,” the FAA said in a statement.