1 police officer killed in explosion in northern Spain

MADRID -- One police officer was killed and another injured in an explosion on Tuesday morning in Oviedo, northern Spain, Spanish news agency EFE reported, citing National Police sources.

The officers discovered a backpack containing an explosive device at a residential building in the city's Villafria neighborhood at around 7:00 am local time (0600 GMT) while responding to a shooting incident that left a woman injured, and the device subsequently detonated, EFE reported.

Citing the Spanish National Police union Jupol, EFE said that the blast killed an officer from the police canine unit. The injured officer, a specialist from the National Police's bomb disposal unit, lost a leg and remains in serious condition.

National Police sources said officers are searching for the suspect in the shooting, who may still be armed.