A forensic probe into the July 1 bus tragedy in Maharashtra's Buldhana, in which 25 passengers were charred to death, has revealed that its driver was under the influence of liquor when the accident occurred, a police official said on Friday.

The sleeper coach bus caught fire after hitting a divider on the Nagpur-Mumbai 'Samruddhi Expressway' at Pimpalkhuta village in Buldhana in the wee hours of Saturday. Eight persons, including the driver and 'cleaner' (driver's assistant), survived the horrific accident.