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Pyeongchang 2018 Winter Olympics

Biathlon - Pyeongchang 2018 Winter Olympics - Men's 4x7.5 km Relay Final - Alpensia Biathlon Centre - Pyeongchang, South Korea - February 23, 2018 - Gold medalists Peppe Femling, Jesper Nelin, Sebastian Samuelsson and Fredrik Lindstroem of Sweden, silver medalists Lars Helge Birkeland, Tarjei Boe, Johannes Thingnes Boe and Emil Hegle Svendsen of Norway, and bronze medalists Erik Lesser, Benedikt Doll, Arnd Peiffer and Simon Schempp of Germany are seen on the podium during the victory ceremony. REUTERS/Murad Sezer

Explosion, gunman attacks rock Norway

A powerful explosion rocked a government building in central Oslo on Friday