Cold wave further tightened its grip in the northern parts of the country on Thursday with most parts remaining engulfed in a thick blanket of fog, once again leading to cancellation of flights and disruptions in rail and road traffic.

Jalandhar [ Images ] was the coldest place in the plains, recording a minimum temperature of minus 0.6 degrees Celsius. Amritsar [ Images ] also reeled under intense chill as the mercury dipped zero degrees C, down four degrees.

Chandigarh, Udhampur, Jammu, Pathankot, Adampur, Halwara and Delhi [ Images ] reported zero visibility due to fog early Thursday morning, the Meteorological Department in Chandigarh said.

Indian, Jet Airways [ Get Quote ] and Air Deccan flights from Delhi to Chandigarh had to be cancelled for third consecutive day due to the bad weather conditions.

Delhi residents braved a cold night as the national capital recorded a low of five degrees Celsius, down two degrees.

After witnessing snowfall earlier this week, piercing cold swept Srinagar [ Images ] and the low dropped to minus four degree Celsius, two degrees below normal range.

Most of Haryana has also been reeling under severe cold wave conditions. Hisar recorded a low of 3.3 degrees Celsius, down two degrees while Karnal registered a three degrees below normal low at four degrees Celsius.

Rail traffic on the Delhi-Ambala-Kalka section of the northern railways was affected due to dense fog. Many long distance mail, express, superfast and some sub-urban trains were running one to six hours late on this section, a report from Sonepat said.

Similarly, vehicular traffic on national highway number one and other state highways in Punjab [ Images ] and Haryana was affected due to poor visibility on account of thick fog.