Two people were killed and 14 were injured on Saturday in a shooting at a nightclub and on streets near the Norwegian capital, Oslo, Norwegian police said.
A suspect believed to be the sole perpetrator was arrested, police told reporters.
The crime scene spread from the London pub through a neighboring club to a nearby street where the suspect was arrested a few minutes after the shooting began, police spokesman Tore Barstad told the daily Aftenposten.
The London Pub is a popular gay bar and nightclub in central Oslo.
“I saw a man with a bag arrive, grab a gun and start firing,” journalist Olav Roenneberg of public broadcaster NRK reported.
It was not immediately known what the motive for the attack was.
Oslo will hold its annual Pride Parade later on Saturday.
“The death of two people is confirmed,” the Oslo police department said in a tweet.
Hospital on red alert
Some 14 people were taken to hospital, some with serious injuries, police said.
Photographs published by the VG newspaper, the NRK station and others showed a large concentration of emergencies outside the pub, including police and ambulance workers.
Helicopters flew over central Oslo as ambulance sirens and police cars were heard throughout the city.
Oslo University Hospital said it had gone on red alert after the shooting.