Iran Press/ Asia: Blummenfelt was part of a huge group of almost 40 that came off the 40km bike leg together but looked anything but favourite among some young speedsters.
However, he dug deep to keep driving at the front as the group was whittled down to three, before surging clear in the final kilometre to finish in one hour, 45 minutes and 4 seconds to take Norway's first medal in the sport.
Alex Yee's silver made Britain the most successful nation in the Olympic triathlon, which joined the programme in 2000.
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