The explosion hit five prefabricated houses at around 2pm (local time) yesterday, damaging nearby buildings at Xinmin Township, Fugu County.
Among the injured, 106 have been hospitalised and 41 have returned home following treatment, authorities in charge of rescue work said today.
Rescue efforts have mostly concluded, state-run Xinhua news agency reported today.
Initial investigation indicated that the explosion could be caused by explosives. The makeshift houses had been built inside a residential compound. The explosion also damaged 58 nearby houses and 63 cars.