A General Court Martial has sentenced Colonel Anil Sehgal, one of the officers involved in the Tehelka expose, to four years' rigorous imprisonment and cashiered him from the army.

The five-member GCM, headed by Brigadier Kuldip Singh, on Tuesday evening found Col Sehgal of the Directorate of Ordnance Services guilty of three of the four charges against him, sources said.

He was convicted for accepting illegal gratification of Rs 20,000 from Tehelka journalists, who had posed as arms dealers, on two occasions, of accepting hospitality of liquor and call girls, which he himself admitted during the GCM proceedings, and meeting officials of arms dealers without taking Directorate of Military Intelligence's permission.

The GCM was ordered in April 2004 in the wake of the Tehelka expose in September 2000.