Norwegian police say they are investigating an overnight mass shooting in Oslo that killed two people and injured more than a dozen as a case of possible terrorism.
In a news conference on Saturday, police officials said the man arrested after the shooting was a Norwegian citizen of Iranian origin who was previously known to police but not for major crimes.
They said they had seized two firearms in connection with the attack: a handgun and an automatic weapon.
The events occurred outside a bar in the downtown area of the Norwegian capital in the early hours as the city was gearing up for its annual Pride parade. Organisers cancelled all Pride events planned for Saturday on the advice of the police.
Police spokesman Tore Barstad said the motive was not immediately known and that it wasn't clear whether the shooting had any connection to the Pride parade that was to be held on Saturday in Oslo.
"Police are in contact with the organisers of the Pride event this Saturday. There will be a continuous assessment of what measures police should take to protect that event and whether this incident has a connection to Pride at all," Barstad told reporters.
He said 14 people were receiving medical treatment, eight of whom have been hospitalised.
Olav Roenneberg, a journalist from Norwegian public broadcaster NRK, said he witnessed the shooting.
"I saw a man arrive at the site with a bag. He picked up a weapon and started shooting," Roenneberg told NRK. "First I thought it was an air gun. Then the glass of the bar next door was shattered and I understood I had to run for cover."
Norwegian broadcaster TV2 showed footage of people running down Oslo streets in panic as shots rang out in the background.
Oslo Pride organisers said they were in close contact with the police.
"We are shocked and saddened by the tragic incident, and we are following it closely," Oslo Pride said in a Facebook statement. "Our thoughts are with the victims and their loved ones."
Norway is a relatively safe country but has experienced violent attacks by right-wing extremists, including one of the worst mass shootings in Europe in 2011, when a right-wing extremist killed 69 people on the island of Utoya after setting off a bomb in Oslo that left eight dead.
In 2019, another right-wing extremist killed his stepsister and then opened fire in a mosque but was overpowered before anyone there was injured.