An explosion on Sunday outside the U.S. embassy in Oslo, Norway, may be linked to the ongoing Middle East security situation, police have said said.

As of Sunday afternoon, no suspects had been identified, Norwegian police added.

"It's natural to see this in the context of the current security situation and that this could be an attack deliberately targeting the U.S. embassy," police spokesperson Frode Larsen told a news conference.

A “loud” explosion occurred at the entrance to the U.S. embassy in the city in the early hours of Sunday morning.

The incident reportedly did not cause any deaths and resulted in minor damage at the scene.

"A loud bang/explosion was reported at the scene," Oslo police told CBS News in a statement.

“Around 1 a.m. we received several reports of explosions. We arrived after a short time and determined that there had been an explosion that had hit the American embassy, ​” police incident commander Michael Delmer told public broadcaster NRK, in comments via Google translate.

He added that there had been minor injuries, and that police had used dogs, drones, and helicopters to investigate what happened.

The Independent has contacted the embassy and the U.S. State Department for comment.

"There was a very thick layer of smoke on the street," said Sebastian Toerstad, 18, a high school student who drove past the embassy at the time of the incident.

"There was some damage to the entrance," Toerstad told Reuters.

Authorities have not said what caused the explosion nor whether any potential suspects have been identified or arrested.

Norway’s national civilian police agency described the events slightly different in a police log.

“The police have large resources in the area around the US embassy,” the log reads, via Google translate. “At approximately 0100, a loud bang/explosion was reported at the scene. The police are in dialogue with the embassy and no injuries have been reported. There is currently no information about exactly what happened or who may be involved.”

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