One person has been taken into custody after he opened fire inside a mosque in the Norwegian capital Oslo.
"One person is shot. The severity of that person's injuries is unknown. One suspect is arrested. The police are working at the location," Oslo police said on Twitter.
Later a woman was found dead at the house of the suspect.
"A young woman was found dead at the suspect's address," assistant chief of police Rune Skjold told the media, adding that the man was suspected of murder.
According to reports, the gunman was dressed in black and wore a helmet and bulletproof vest.

GCC and EU ministers urge immediate halt to Iranian attacks
Trump wants say on Iran's next leader
British PM Starmer to send four Typhoon jets to Qatar
Bombing of Tehran intensifies as war enters day six
Azerbaijan vows to respond after four injured by Iranian drones
