At least 13 people were feared dead and scores injured when an animation studio was torched in Japan on Thursday, authorities said.
The cause suspected to be arson by a man, who shouted “Die” as he doused the building with petrol.
Prime Minister, Shinzo Abe, called the fire in the city of Kyoto – the latest grisly killing in a country known for its low crime rates – “too appalling for words” on Twitter and offered condolences to the victims.
Police had taken a 41-year-old man, who had shouted “Die” as he poured what appeared to be petrol around the three-story Kyoto Animation building shortly after 10 a.m. (0100 GMT) into custody, public broadcaster NHK reported.
White and black smoke billowed from the windows of the building, television footage showed.
The studio produces popular series such as the “Sound Euphonium”.
It’s “Free! Road to the World – The Dream” movie is due for release this month.
“I heard the sound of fire engines and stepped outside my house, and saw big flames spewing out of the building,’’ NHK quoted a 16-year-old boy as saying.
“Fire department officials were trying to rescue the injured in a nearby park but it seemed like there weren’t enough of them,’’ he said.
The casualties included seven confirmed dead, six with no vital signs, and another 10 or so people found unconscious, a Kyoto city fire department official told Reuters.
Another 36 have been 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.
The fire department official said earlier that some 30 people, who were believed to have been in the building at the time of the fire, could not be reached.
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, a city 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.