In Rajasthan, six persons were killed and ten others injured when the pick-up van they were travelling in collided head-on with a roadways bus on the Alwar-Bhiwadi highway amid dense fog Monday morning. Sixteen labourers in the pick-up van were on their way to work when their vehicle collided with a Rajasthan roadways bus, killing six on the spot. Police said, ten of the critically injured were rushed to a Alwar hospital.