Al Jazeera English reported that a magnitude 5.7 earthquake struck Shizuoka prefecture in central Japan. It said more than 20 people were injured in the quake. It also reported that authorities have warned strong aftershocks are possible over the coming days. The exact number and severity of injuries is unclear. It is unclear whether any deaths or structural damage occurred. It was not stated which authorities issued the warning. The time of the quake, its depth and its epicentre were not given.