At least 23 people are dead and dozens injured after a suspected arson attack at an animation studio in Kyoto, Japan, local emergency officials have said. <br />Local media quoted police as saying a man broke into the Kyoto Animation Co studio on Thursday morning. Police say the suspect, a 41-year-old, sprayed petrol before igniting it.<br /><br />Some people still remain unaccounted for, broadcaster NHK reported.<br /><br />The suspect has been detained and was taken to hospital with injuries.<br /><br />Japan's Prime Minister Shinzo Abe said the incident was "too appalling for words" and offered condolences to those affected.