The tremor at 3:54 am (1854 GMT Saturday) injured seven people but caused no damage to the Fukushima Daiichi plant, which was ravaged by a 9.0 quake and ensuing tsunami in March, the national Fire and Disaster Management Agency said. A strong 6.4-magnitude earthquake struck off northeast Japan#39;s Fukushima region, home to a crippled nuclear power plant, early Sunday, but there was no risk of a tsunami, seismologists said. In the city of Hitachinaka, a 60-year-old man broke his wrist when he
