There have been three new explosions Thursday at a northern Chinese coal mine where 166 miners died in a blast earlier in the week.
State media report 61 people were underground, searching for those missing from Sunday's explosion, when the first new blast occurred at the Chenjiashan coal mine in Shangxi province. The rescue crew escaped unharmed.
Meanwhile, four Chinese mine officials have been arrested in connection with an October explosion that killed 148 people at another coal mine.
Prosecutors charged the four with negligence for the Daping mine blast in Henan province. Investigators say the four failed to act when gas levels reached a danger point.
China's mines are the world's deadliest, with thousands of deaths every year from explosions, fires, flooding and other causes.
Some information for this report provided by AFP.