A magnitude 7.3 earthquake struck southern Japan early on Saturday, killing at least 11 people, injuring hundreds more and trapping people in collapsed buildings, media reported, just over a day after a quake killed nine people in the same region. Authorities warned of damage over a wide area, as reports came in of scores of people trapped in collapsed buildings, fires and power outages. Prime Minister Shinzo Abe, arriving at his office, told reporters the government was making every effort to determine the extent of the damage, carry out rescue and recovery, and to get accurate information to citizens. “It’s possible that there may be damage over a wide area,” Abe said. The Japan Meteorological Agency initially said the Saturday quake was 7.1 magnitude but later revised it up to 7.3.