An “extremely intelligent” bear that injured four people in Fukushima Prefecture remains at large as of Friday after apparently unlatching a window while evading capture and turning on a water tap, officials said.A record 13 people were killed by bears in Japan last year, and there has been a jump in sightings as the animals emerge hungry from hibernation.After attacking four people at two factories in the city of Fukushima on Tuesday, the bear took shelter inside one of the buildings, local media reported.