A bear attack left four people injured in two factories and a residential area in northern Japan's Fukushima on Tuesday, police and media reports 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.

"A bear-related human injury incident... occurred in Fukushima City, injuring four people," the prefectural police said in a statement.

The bear was first spotted in a car parts factory, prompting an emergency call explaining that "employees had been bitten," the Yomiuri Shimbun daily reported, citing police and fire department officials. The outlet reported the bear still had not been located.

As the bear continued its rampage, two other people were injured, one in a residential area and the other on the premises of an electronic equipment manufacturer nearby, the Yomiuri said, adding that the animal was thought to have remained inside the factory.

The report said one of those attacked was heavily injured, while the rest suffered only mild injuries.

In the last fiscal year to March, bear sightings nationwide topped 50,000, more than double the previous record set two years earlier, according to official data.

The animals have been seen on airport runways, walking on golf courses, roaming near schools and causing panic in supermarkets and hot spring resorts almost on a daily basis. A bear that rampaged through a supermarket for two days was lured out with food coated in honey, and police said the animal was trapped and later killed.

The problem was so bad that last year the U.S. State Department warned Americans in Japan to be alert for bears.

Record sightings have been reported again this year as the bears emerge from their winter slumber, according to local media.

In April, bear attacks killed one person and injured five others, according to the environment ministry.

There have also been more than a dozen bear sightings reported on the outskirts of Tokyo this year, with a Russian man in his 30s reportedly mauled as he hiked in the city last month.

A Japanese company making ferocious-looking robot wolves is being swamped by orders after record numbers of fatal bear attacks on humans last year.

"Monster Wolf" is an animatronic scarecrow with flashing red eyes that howls and growls menacingly to scare away wild animals.

Scientists say the surge in attacks has been driven by fast-growing numbers of bears, combined with a falling human population, especially in rural areas.

That depopulation has left bears "a chance to expand their range," biologist Koji Yamazaki, from Tokyo University of Agriculture, told CBS News' Elizabeth Palmer in 2023.

Source