UPDATE 1-"Active shooter" at U.S. Navy base in Pensacola, Florida

Authorities were investigating an "active shooter" on Friday at Naval Air Station Pensacola, a U.S. Navy base in Florida, the Escambia County Sheriff's office said.

"I can confirm that there's an active shooter on NAS Pensacola right now," said Amber Southard, a sheriff's spokeswoman. She said she had no further information to share. There were no immediate reports of injuries.

"We are aware of reports of a possible active shooter at Naval Air Station Pensacola," the Navy wrote on its Twitter account.