The cold wave tightened its grip over most parts of North India on Monday claiming six more lives in the region, which wore a blanket of fog in the morning.

Five more persons were killed in Uttar Pradesh, taking the toll during the past two days to 10 in the State, while a beggar died in Samba district of Jammu. The fog reduced visibility in the national Capital. The minimum temperature was 7.7 degrees Celsius, said the weatherman, forecasting a foggy Tuesday morning. The maximum was 19.1 degrees, three notches below normal.