Cold wave conditions have further intensified in North India with thick fog covering several parts of the region. The winter chill further aggravated in Punjab, Haryana and Chandigarh with the mercury nose-diving by up to seven degrees below normal.<br/>Met office said, Amritsar was the coldest place in the region, recording a minimum of zero degree Celsius.<br/><br/>AIR correspondent reports that mercury in Chandigarh dipped to 3.2 degrees below the normal.<br/><br/>In Haryana, Ambala recorded a low of 0.3 degree Celsius, while it was 0.9 degrees at Rohtak.<br/><br/>In Himachal Pradesh, Keylong, headquarters of Lahaul and Spiti district, with a night temperature of minus 9.7 degree Celsius remained the coldest place.<br/>Mount Abu remained the coldest place in Rajasthan with a minimum temperature of one degree Celsius.<br/><br/>A chilly morning with a mist cover greeted people in the national capital even as the mercury rose marginally to settle at 6.3 degree Celsius.<br/> <br/>