Officials expressed concern Wednesday that a magnitude 5.8 earthquake that hit northern Kyushu that morning could hamper the area's efforts to repair damage caused by a more powerful quake just a month ago.

At least 61 people, mostly in Fukuoka Prefecture, were injured by the 6:11 a.m. quake.

Five people were injured seriously, including a 41-year-old woman who fractured her shoulder while trying to stop a Buddhist altar from falling over in her home in Fukuoka's Sawara Ward, local authorities said.