Mosque Shooting Investigated As 'Terror Attempt'

#UPDATE: An armed attack at a Norwegian mosque will be investigated as a possible act of terrorism, police say.

The suspected shooter at the al-Noor Islamic Centre near the Norwegian capital - a young, white male carrying several guns - had expressed far-right, anti-immigrant views online, assistant chief of police Rune Skjold told a news conference on Sunday.

"We're investigating this as an attempt at carrying out an act of terrorism," he said.

Police attend the scene after a shooting inside the al-Noor Islamic center mosque in Baerum. Photo: AAP

The suspect had been apprehended after the attack, in which shots were fired but no one was hurt, with members of the congregation having overpowered him before police arrived.

"These people showed great courage," Skjold added.

Earlier police told a news conference an older man had sustained light injuries.

They said it was too early to say if the man's wounds were caused by the gunshots or sustained while restraining the gunman.

Mosque director Irfan Mushtaq told TV2 the shooter wore body armour and a helmet and was overpowered by members of the mosque before police arrived.

Mosque board member Irfan Mushtaq. Photo: AAP

"The man carried two shotgun-like weapons and a pistol. He broke through a glass door and fired shots," Mushtaq said.

Only three people were present in the mosque at the time of the attack, preparing for Sunday's celebration of the Eid-al-Adha festival, mosque spokesman Waheed Ahmed told Reuters on Saturday.

The attacker was also suspected of killing one of his own family members, a young woman who was found dead at his home, police said earlier.

Photo: AAP

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.