WASHINGTON (AP) — The State Department says it is trying to determine if any U.S. citizens were killed or injured in the Oslo bombings and has no confirmed reports of American casualties.

President Barack Obama says today’s attacks in Oslo are a reminder that the world has a role in stopping such terror from happening. He also expressed his condolences to Norway’s people.

Oslo is known for the Nobel Peace Prize that’s awarded there and Obama was the recipient in 2009.