Friday, July 14 2006 12:39 Hrs (IST) - World Time -

Mumbai: Forensic examinations have confirmed that the explosive used in Tuesday's serial blasts in the city's suburban trains was not the deadly RDX and it could have been dynamite or ammonium nitrate.

"The revelation may change the focus of the probe on the alleged role of Laskhar-e-Toiba (LeT) in the blasts," police said.

Laboratory tests performed on nearly a dozen samples collected from seven blast sites have confirmed that the explosive used was not RDX, a top Mumbai police official told sources, but refused to reveal the nature of the explosive.

Intelligence sources, however, said that it could be plain dynamite, which was commonly used in India for blasting rocks and in mines.

Intelligence source have also not ruled out the possibility of the use of chemical ammonium nitrate in the explosives.

Mumbai police sources said that the use of commonly used explosive material like dynamite or ammonium nitrate in the present serial bomb blasts not only dilutes the theory of involvement of bigger terrorist groups like the LeT but also gives credence to the possible involvement of lesser sophisticated local groups.