An electrical fire in an illegal Chinese coal mine has killed 25 people in the country’s latest mining disaster.

Six other miners were saved when the mine, in Zhengzhou, the capital of Henan province, caught fire late on Monday.

Government officials said police have detained four of the mine’s managers and frozen their assets.

A further seven local officials have been sacked after an initial investigation revealed the mine was operating illegally, according to The Associated Press.

Earlier this month 30 miners died after a mine flooded in Inner Mongolia in Northern China.

China’s coal mines are the deadliest in the world with the quest for profits and surging public demand meaning safety precautions are often ignored.

Thousands die in the pits each year with a willing supply of cheap labour resulting in improvements never being made, according to Al Jazeera.