Opposition sources say the car bomb in Aleppo hit an area close to a local security office. The Syrian Observatory for Human Rights said the explosion had killed and injured people in the area but gave no estimate on the number of casualties.
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ITV News Europe Editor Emma Murphy said Putin's team have pointedly claimed the Skripal poisoning crisis has boosted his victory.
Largely dry elsewhere tonight with a widespread frost and icy stretches
The so-called mini-Beast from the East has swept in, bringing with it snow, ice and strong winds.