In a mysterious turn in the case of alleged sabotage of industrialist Anil Ambani's helicopter, the man who spotted pebbles in its fuel tank was found dead on the railway track near Vile Parle.

"Bharat Borge's body was found by police. A letter was found on his person," Government Railway Police Commissioner A K Sharma told PTI. He, however, refused to divulge the contents of the letter.

Borge was among the first persons to have spotted the fuel cap of Ambani's helicopter open on Thursday last and on inspection found pebbles and gravel inside.

There were no comments from Anil Ambani Group which had alleged that business rivals may be behind an "attempt to murder" the industrialist by trying to sabotage his helicopter.

Confirming the death of Borge, his employer Airworks India, the company, which had the contract for the maintenance of Ambani's helicopter, said in a statement that his demise was "unfortunate and tragic".

Borge's body was found dead on the railway track this evening between Vile Parle and Andheri suburban stations. He is suspected to have been run over by a Churchgate-bound fast local train near Vile Parle. His body has been sent for post-mortem.