At least 33 killed in 'appalling' arson attack on Japanese animation studio

A man shouted "die" as he doused an animation studio with fuel and set it ablaze in Japan on Thursday, public broadcaster NHK said, killing at least 33 people in the nation's worst mass murder in nearly two decades.

Prime Minister Shinzo Abe called the attack in the city of Kyoto - the latest grisly killing in a nation widely known for its low crime rates - "too appalling for words" on Twitter and offered condolences.

Police detained a 41-year-old man who had shouted "die" as he poured what appeared to be petrol around the three-storey Kyoto Animation building shortly after 10 a.m. (0100 GMT), public broadcaster NHK reported.

Thirty-three people were confirmed dead, an official for the Kyoto City Fire Department said.

Fire engulfed the building as white and black smoke billowed from its charred windows. It was Japan's worst mass killing since a suspected arson attack on a Tokyo building in 2001.

Shiro Misaki, a 47-year old owner of a neighbourhood bar five minutes from studio, said he was driving nearby when he saw the thick smoke.

"Policemen were stopping traffic and it was really hazy with smoke," he said. "Even after I got back to my restaurant I could smell the smoke."

The prime minister said the cause was arson.

"Today, many people were killed and wounded in an arson murder case in Kyoto," Abe said in a post on Twitter.

"It is too appalling for words."

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Some of the victims were found in the studio, some on the third floor and others in a staircase leading up to the roof, the fire official said. Another 36 were injured, 10 of them seriously, the official said.

The suspected arsonist was injured and was being treated in hospital, so police could not question him, NHK said.

Kyoto police declined to comment.

The studio produces popular series such as the "Sound! Euphonium". Its "Free! Road to the World - The Dream" movie is due for release this month.

"I am heartbroken," Hideaki Hatta, the studio's chief executive told reporters. "It in unbearable that the people who helped carry Japan's animation industry were hurt and lost their lives in this way."

There was an outpouring of support for the studio on Japanese-language social media, with some users posting pictures of animation. Many posted with the hashtag "#PrayForKyoani" - using an abbreviation for Kyoto Animation.

The studio has an outsized impact on Japan's animation industry that outstrips the list of works it has produced, said Tokyo-based film commentator Yuichi Maeda.

"It has a huge presence in animation here. To have this many people die at once will be a huge blow to the Japanese animation industry," he said.

Violent crime is relatively rare in Japan but occasional high-profile incidents have shocked the country.

Less than two months ago, a knife-wielding man slashed at a group of schoolgirls at a bus stop in Kawasaki, just south of Tokyo, killing one girl and the father of another, while injuring more than a dozen children.

In 2016, a man armed with a knife broke into a facility for the disabled in a small town near Tokyo and killed 19 patients.