PONCE — (CNN) Three police officers in Puerto Rico were killed by a fellow officer at police headquarters in the city of Ponce, Puerto Rican police said via Twitter on Monday. A suspect is in custody, police said.

“There are no words to describe this tragedy where three colleagues have lost their lives,” Puerto Rico Police Deputy Superintendent Col. Juan Rodriguez Davila said.

The officer who was arrested is accused of killing a police commander, a lieutenant and an officer. His name was not immediately released.

Ponce is on Puerto Rico’s southern coast.

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