The CBI team comprising officials from Delhi and Chandigarh reached the bungalow of Ajay Choudhary at Staff road this morning.
Later, the CBI took Choudhary in a vehicle but it was not immediately known whether he was detained for questioning or had been arrested.
Choudhary, whose name had figured in the land scam during his stint as Defence Estate Officer in Srinagar, was suspended for his alleged involvement in the scam in which costly land was disposed of to some private party in violation of rules.
Following public outcry, Defence Minister A K Antony had ordered a CBI probe. The agency had registered a case in this regard and named Choudhary.
Chaudhary was transferred to Ambala in April 2010 from Srinagar.