Security officials and experts have predicted that an unprecedented attack was in the offing, and would be nigh impossible to thwart. "Determined guys who are prepared to die, who have studied their target and have a solid operational background, they can do a lot of damage," said Yves Trotignon, who used to work for DGSE intelligence agency's anti-terrorist service.

"More jihadist fighters are graduating as veterans every day. Faced with that, it has to be said, the (security) services are overwhelmed," he said.

Eight assailants, a mix of gunmen and suicide bombers, killed more than 150 people and wounded over 200 in attacks at six popular Parisian recreational spots late yesterday. Targets included the Bataclan concert hall and eateries around the Stade de France sports stadium where a France-Germany football match was underway.

Also hit was a restaurant in a vibey Parisian neighbourhood near Republique square, not far from the erstwhile offices of the Charlie Hebdo satirical magazine where 12 people were gunned down in January. So far this year they have been fortunate: more than one potential bloodbath was prevented by the offender's own ineptitude.

In April, Algerian IT student Sid Ahmed Ghlam was arrested after he shot himself in the leg by accident, leading police to uncover a plot to attack a church in Paris' Villejuif suburb.

Read More News on Paris Terror Attacks:-

Paris terror attacks: 153 killed, World leaders respond with shock

Barack Obama calls up Francois Hollande after Paris terror attacks

Latest News from World News Desk