Two cousins aged 14 and 15 have been reported missing from their home in Newton Aycliffe.
Thomas and Kieran Miller have not been seen since Sunday.
The police say they are concerned because of the age of the boys.
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Icy first thing and windy, with wintry showers lingering further south, especially at the coast. Brighter elsehwere
Emma brings you Saturday's forecast
Longest spell of winter so far. Bitterly cold with further wintry showers