French detectives are continuing to search for fugitives suspected to have been involved in the Paris massacres, as details of how police foiled the terrorists’ operations have begun to unfold.

President Francois Hollande warned that the danger to France, home to the European Union’s biggest communities of both Muslims and Jews, was not over yet.

Security forces dramatically ended a three-day terror spree around Paris, killing the two al Qaida-linked brothers who staged a murderous rampage at a satirical magazine, and an associate who seized a kosher supermarket to try to help them escape.

French President Francois Hollande has called on the country to “remain vigilant” as the hostage crisis which started at the Charlie Hebdo magazine massacre came to a bloody end with the loss of at least 20 lives.

At least four people, including the attacker, have died at a kosher grocery store in Paris where a gunman took several hostages, police officials said.

Police union representative Christophe Crepin has told LCI television that it appeared that the gunman who took hostages at a kosher market in Paris has died after police stormed the building.

The two brothers behind the Charlie Hebdo terror attacks in Paris have been killed, according to reports, as police stormed both siege scenes.

Explosions and gunshots have rung out and smoke is rising outside a building in Dammartin-en-Goele where two brothers suspected in the Paris newspaper massacre are holed up with a hostage.

Gunfire and explosions have been heard in Dammartin-en-Goele where two brothers, believed to be responsible for the Charlie Hebdo killings in Paris, are holding a hostage.

The brothers who are suspected of carrying out Wednesday's shootings at the offices of satirical Charlie Hebdo on Wednesday are reportedly holed up in a printworks building on the outskirts of Paris.