Norwegian police said on Monday they had arrested a suspected shooter after receiving reports of gunfire at Oslo's largest shopping centre.
Police said in a statement that no injured people had been found and that it was safe to reopen the centre again, after it was earlier evacuated.
"As of now, it appears that there was only one perpetrator involved," the statement said.
Police spokesperson Tomm Berger told journalists the suspect, a 19 year-old, had called the police before he fired a single shot with a shotgun into the ceiling. The suspect had also been carrying a baseball bat and a knife.
Riyadh airport to designate terminals for flights from October 25
Around 1,200 Palestinians displaced in Hebron as Israel begins military operation
Jordan tightens security after deadly church attack kills nine
Houthi missile shrapnel falls in Saudi Arabia's Jeddah, Taif, Rabigh after interceptions
Violence flares in Paris after largely peaceful protests across France
