Update:

Three police officers have been confirmed killed and at least three others were injured in a shooting Sunday in Baton Rouge, Louisiana, according to the sheriff's office.

One suspect was also killed and authorities say two others may be at large. Police did not say whether the officers had been targeted or whether the shooting occurred during a law enforcement situation.

Earlier:

Several police officers have reportedly been shot in Baton Rouge, Louisiana, according to officials who say the situation is still unfolding.

The New Orleans-based Advocate reports that "Both lanes of Airline Highway are shut down from Goodwood Boulevard to Old Hammond Highway and from Old Hammond to Drusilla Drive." Civilians are urged to stay away.

CNN reports that seven officers were shot, although Sgt. Don Coppola of the Baton Rouge Police Department told local media the extent of the injuries and the status of the shooter are unclear.

Kip Holden, the mayor-president of East Baton Rouge Parish, said, "There is still an active scene.... Right now we are trying to get our arms around everything."

"The count is three officers dead possibly," Holden said. "Everything is moving fast and I have not been able to verify everything."

The shooting follows charged protests in Baton Rouge over the police killing of Alton Sterling, a black man whose death was caught on video, and the deaths of five officers ambushed by a shooter in Dallas, Texas just days later.