New Delhi: The CBI is all set to question three retired Army officials who held key positions in procurement and quality assurance units and joined Tatra supply accused Ravinder Rishi's firm Vectra post-retirement.

The agency is trying to establish alleged links of Rishi in the Defence establishment who helped him in procurement and supply of Tatra all terrain vehicles from BEML, sources said.The agency has questioned a number of officials of BEML and Vectra in connection with the case.

CBI sources said they are suspecting that these officials during their tenure at Master General Ordnance Branch and the Directorate General of Quality and Assurance did not underline shortcomings in the Tatra vehicles.

They said Army officers had highlighted shortcomings in the Tatra vehicles especially alleged problems encountered during the high altitude operations on a higher gradient levels but the two branches did not question the suppliers on these issues.

Two out of three officials who are under scanner had joined Vectra Engineering while one joined Vectra Global Helicorp at senior positions post-retirement, they said.

The agency has written to the Defence Ministry seeking records of quality checks done by it and reports of field offices who were using these vehicles during the period.

CBI is also probing if better vehicles were available with Czech Republic based Tatra, why were they not preferred despite supply agreement renewed twice - in 1997 and 2003.