The Turkish government rejected calls to investigate mines in the eastern region of Soma just just weeks before the incident which killed over 200 miners, according to a Turkish newspaper.
Turkey's main opposition, the Republican People’s Party, submitted a motion to Parliament last year to investigate work-related accidents at coal mines in Soma, only for the proposal to be rejected three weeks ago, said Hurriyet Daily News.
An explosion at a mine in Soma is feared to have trapped nearly 800 miners, in what Turkey's prime minister has said is probably the country's worst mining disaster.
More top news
Parliamentary inquiry finds thousands of children could fall prey to sexual exploitation and gangs because of flawed warning systems.
David Cameron said the June 23 referendum is the most important vote young people will place in their lifetimes.
Plan would leave steelworkers worse off in retirement - but not as worse off as those in other pension schemes.