Three police officers are dead after another police officer opened fire upon them at a police station in Puerto Rico, investigators said Monday. The shooting occurred Monday morning at the regional headquarters located in Ponce, roughly 45 miles southwest of San Juan.

"There are no words to describe this tragedy where three colleagues have lost their lives," Puerto Rico Police Deputy Superintendent Col. Juan Rodriguez Davila wrote on Twitter. "Our condolences are with the families."

Shortly after the shooting, police failed to reveal the names of those killed during the incident, only identifying them as a police commander, lieutenant and an officer. However, a local newspaper later identified them as 49-year-old Commander Frank Román, 49-year-old Lieutenant Luz M. Soto, and 42-year-old officer Rosario Hernández de Hoyo, according to BNO News.

Police report that the suspect is in custody, but his name and has yet to be revealed, according to CNN.

"The officer suspected of killing the three police officers at Ponce Command has been detained," the statement said.

Police are investigating to determine the motive for the shooting.