Hundreds of people queued from the early hours outside UK shops selling the latest edition of French satirical magazine Charlie Hebdo.
It comes as around 10 people have been arrested and questioned over the "possible logistical support" they may have provided three gunmen who carried out last week's attacks in Paris, Agence France-Presse reports.
Islamist militant group Boko Haram has posted a video online showing the man believed to be leader of the group praising the recent attacks in France.
In the footage Abubakar Shekau says the Jihadi Sunni group was "very happy with what happened in France".
Nigerian media has reported Shekau's death on numerous occasions, but his subsequent appearances in similar video messages have appeared to debunk the claims.
Boko Haram made international headlines after the kidnapping of hundreds of schoolgirls in north-eastern Nigeria.
Reuters, which obtained the video from social media, could not independently varify the video.
About 7,000 French Jewish people left the country last year and have moved to Israel because they did not feel safe.
The aunt of a man killed while trying to overpower gunman Amedy Coulibaly has told ITV News her family is fearful of their future in France.
A Muslim cleric in Pakistan has held a ceremony to honour Cherif and Said Kouachi, the two men suspected of the Charlie Hebdo massacre.