Norwegian police will investigate Saturday’s shooting at a mosque as “a possible act of terrorism,” they announced on Sunday.
The man suspected of a shooting at the al-Noor Islamic Centre near the country’s capital may have also killed a relative before the attack, police said on Saturday.
A young woman was found dead at the suspect’s address,” assistant chief of police Rune Skjold told a news conference, adding that the man was suspected of murder.
The suspected shooter injured one person during the attack.
Earlier police had said that a “young white man” had been apprehended, adding that members of the congregation overpowered the gunman and stopped the shooting.
Police believe the man had acted alone.
“He is around 20 years old, a Norwegian citizen from the area,” Skjold told Reuters.
A 75-year-old member of the congregation sustained light injuries in the attack but it was too early to tell if they were caused by the gunshots or sustained during the attempt to restrain the gunman, police said.
“The man carried two shotgun-like weapons and a pistol. He broke through a glass door and fired shots,” mosque director Irfan Mushtaq told TV2.
The shooter, who wore body armour and a helmet, was overpowered by members of the mosque before police arrived, Mushtaq added.
There were only three people present in the mosque at the time of the attack, who were preparing for Sunday’s Eid celebrations, which up to 1,000 people were expected to attend, mosque spokesman Waheed Ahmed told Reuters.
The mosque earlier this year implemented extra security measures following the massacre of more than 50 people at two New Zealand mosques by a suspected right-wing extremist.
In 2011, anti-Muslim neo-Nazi Anders Behring Breivik massacred 77 people in Norway’s worst peacetime atrocity, the majority of them teenagers at a youth camp.