TOKYO: A hapless armed robber in his 60s broke his leg while holding up a convenience store in Japan — and then used the shop’s payphone to call an ambulance, according to a report and police. The inept thief tussled with a 35-year-old store clerk after threatening him with a knife in Chiba, east of Tokyo, on Sunday. The crook was disarmed in the struggle, which saw him fall to the ground and break his leg before hobbling out of the shop, the local China Nippo newspaper reported. In increasing pain and unable to get very far, the unnamed man limped back an hour later and used the payphone at the store to summon an ambulance, the paper said. Detectives are planning to arrest the suspect when he is released from hospital, the paper reported.