An American general in Iraq said last night that his troops had uncovered 11 vans buried underground that could be mobile chemical and biological weapons laboratories. No weapons of mass destruction were found in or around the 20ft square metal units, said Brigadier General Ben Freakley, of the 101st Armoured Division, whose soldiers made the discovery near a weapons facility outside Kerbala, 50 miles south of Baghdad. It was visited by UN inspectors at the end of February. "Initial reports indicate that this is clearly a case of denial and deception on the part of the Iraqi government," Brig Freakley...