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.
A news photographer was among those injured when he was shot by anti-Charlie Hebdo protesters in Pakistan, police have said.
Asif Hassan, who works for news agency Agence France-Presse, was covering the demonstration near the French consulate in Karachi when the protest turned violent.
Senior police officer Abdul Khalique Shaikh told Reuters that the shots had come from protesters, and said officers had not opened fire.
AFP reports that the bullet hit Mr Hassan's lung and passed through his chest. He needed surgery but is now said to be in a stable condition.
Read: Violence erupts in anti-Charlie Hebdo protest in Pakistan
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.