In the wake of the attacks on Paris, Britain’s prime minister David Cameron has sent a message of solidarity to the people of France.

Cameron called those who carried out the attacks “brutal, callous murderers” and vowed that efforts would be stepped up to eradicate the threat from the group calling itself Islamic State.

“However strong we are, however much we prepare, we in the UK face the same threat,” said the prime minister. “That’s why we continue to encourage the public to remain vigilant and we will do all we can to support our police and intelligence agencies with the resources and the capabilities that they need.”

Several countries had already reestablished border controls because of the migrant crisis.

In the wake of the attacks, police in the German district of Saarland have introduced random checks at its border with France.

“We started first controls last night,” explained Juergen Glaub, Saarland federal police spokesman. “The situation is constantly being ree