Norwegian police are looking into a possible explosion at the U.S. Embassy in Oslo that resulted in no injuries and just minor damage.
Amid the , Norwegian Justice Minister Astri Aas-Hansen is allocating “considerable resources” to look for possible multiple perpetrators.
“This is an intolerable incident that we’re treating with the utmost seriousness,” she told Norwegian press agency NTB.
Police said a “loud bang” was reported at the U.S. Embassy in Oslo at 1 a.m. local time Sunday (7 p.m. ET Saturday), and witnesses told Reuters they observed thick smoke near the consular section entrance.
“There was a really thick layer of smoke on the street,” said 18-year-old Sebastian Toerstad, a high school student who drove by the embassy when the explosion happened.
“The entrance had some damage.”
Police said no explosive devices had been discovered in the area.
“Investigations have been conducted at the scene using dogs, drones and a helicopter to search for one or more possible perpetrators,” the Oslo police department stated.
PST, Norway’s police security service, brought in extra staff after the incident but hasn’t adjusted the country’s terror threat level, according to communication advisor Martin Bernsen.
PST operations manager Mikael Dellemyr does not “link” the attack to U.S. bombings in the or terrorist or Iranian retaliation.
“It’s far too early” in the investigation, he told Oslo’s TV 2.
Digital contacted the for comment, but they didn’t respond right away.
The Associated Press and Reuters contributed to this report.