Chilling image from building in Paris shows blood-stained wooden floors and papers strewn across the corridor ,Horrific footage shows officer Ahmed Merabet - believed to be Muslim - being shot in the head at point-blank range
The 42-year-old married officer seen raising his hand in an appeal for mercy, as he lies wounded on the pavement Masked gunmen stormed Charlie Hebdo magazines headquarters in Paris with AK-47s shouting 'Allahu akbar!'
They stalked building asking for people's names before killing editor, three cartoonists and the deputy chief editor .Militants believed to be from Al Qaeda in the Arabian Peninsula which was behind plane bomb plots in US and UK
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Three suspects said to be all French citizens - a homeless teenage man aged 18, and two brothers aged 32 and 34 Gunmen identified as Said Kouachi, 34, and his brother Cherif, 32, as well as Hamyd Mourad, 18, from Reims Mourad surrendered to police 'after seeing his name on social media' and was arrested, source close to case said Britain offered for MI5 and MI6 to join hunt as border guards were on high alert for suspects attempting to flee to UK
