TOKYO—A man brandishing a knife on a Tokyo commuter train on Sunday stabbed several passengers before starting a fire, police said. NHK public television said at least 10 passengers were injured, including one seriously. The attacker, only identified as a man in his 20s, was arrested on the spot and was being investigated on suspicion…

TOKYO—A 24-year-old man dressed in Batman’s Joker costume attacked passengers on a Tokyo train line on Sunday evening, injuring 17 people as many party-goers headed into the city centre for Halloween gatherings, media reported. Police arrested the suspected attacker on the spot, media reported. A man believed to be in his 60s was unconscious and…