Norwegian police reported on Sunday an explosion near the U.S. Embassy in the capital, Oslo, and said there were no casualties.
Last year, an explosion at U.S. Steel's Clairton Coke Works outside Pittsburgh killed two U.S. Steel workers and injured 11 others, including contractors.
A man was charged on Monday for allegedly causing a Plum house explosion in 2022.
Officials described the blast, which caused no injuries, as an antisemitic act, but the exact circumstances were still under investigation.