New Delhi: Expediting its probe in Tatra trucks deal, the CBI on Monday summoned BEML officials for interrogation.

The CBI is investigating into violation of contract signed between defence PSU Bharat Earth Movers Limited (BEML) and a UK-based firm.

The sources said it was in 1997 that Tatra Sipox UK signed the truck supply deal with BEML which was in alleged violation of defence procurement rules. According to the rule the procurement should be done directly from original equipment manufacturer only.

The CBI has alleged that since Tatra Sipox UK was not the original manufacturer of these all terrain trucks, the rule that defence procurements should be made from original manufacturer was violated.

Meanwhile, Czech Republic-based Tatra had said in a statement that it supplies for India various truck components ("CKDs") that make up approximately 30 to 35 per cent of a complete vehicle.

 "The remaining components are made or supplied by other manufacturers or by BEML, an Indian government controlled company that also assembles the Tatra branded vehicles and then sells and delivers them to customers within India under license agreement for Tatra ," it had said in a statement.

It had also stated that neither Ravi Rishi nor his investment company Vectra Limited, control or have controlled -- directly or indirectly -- Tatra a.s.

 "The British company Vectra Limited is a minority stakeholder in Tatra holdings and in principle holds one of the four votes.

 "Nonetheless, Tatra will request from Mr Rishi and Vectra Limited an explanation of the information about any initiated investigation of him and Vectra Ltd by Indian Central Bureau of Investigation (CBI) as it relates to sales of products branded with the 'Tatra' name," it had said in a statement.