A tanker carrying LPG overturned and exploded on a highway near Diyarbakir on July 22.
Erdogan has been power since 2003 and is barred by party rules from running as prime minister again.
Data seized by prosecutors indicate that sensors showed high gas levels inside the mine two days before the disaster.
The government has asked for a parliamentary inquiry into the disaster to find out what happened and why.
Many still trapped day after one of world’s deadliest mine disasters in decades.
Energy Minister Taner Yildiz confirmed that a fire had been triggered by an electrical fault and that workers had been killed, but declined to say how many.
Tech-savvy users, including President Abdullah Gul, have found ways of circumventing the ban on both Twitter and YouTube.
Turkey blocked YouTube as a precaution after voice recordings of senior officials in military operation created a national issue.
Erdogan said Twitter was applying double standards and shut down accounts when the U.S. and U.K. demanded it.
US says Turkey’s ban on social networking site anti-democratic, but Premier says he’s ‘not listening’.
Turkish air defences targeted a Syrian fighter bomber as it struck areas of the northern province of Latakia
Government officials said access to Twitter was blocked because the service ignored “hundreds of court orders” to remove some links deemed illegal.
Turkey’s courts blocked access to Twitter following Prime Minister Tayyip Erdogan’s vow.
Train slammed into the vehicle at a level crossing near the Mediterranean port city of Mersin.
The fresh wave of pre-poll extravaganza could ensure that India continues to remain under watch.