Police hunt for lone gunman who attacked Liberation newspaper and fled down Champs-Elysées After his gun apparently jammed, he shouted: "Next time, I will not miss you." The attacks on Monday sparked a major manhunt, which led to all of the French capital's main news outlets being under police guard and heavy police patrols along the Champs-Elysées with helicopter backup, in search of the elusive suspect. Calling for witnesses to come forward after showing a CCTV image of the suspect, François Molins, the Paris prosecutor, said on Monday evening that police were working on the theory that one man was behind all the attacks. "Given the similarities between the four affairs in the modus operandi, the warnings and the clothing of the (gunman), in the type of munitions found as well, we are working on the theory of a lone perpetrator," he said. The gunman used a 12-gauge shotgun - the most common hunting arm in France - with Brenneke cartridges, used to kill wild boar, and lead shot. Surveillance footage showing the suspected gunman early Monday morning (REUTERS) BFMTV on Monday released video footage of the man who can be seen determinedly entering the television channel's lobby and apparently seeking to shoot at an editor at the welcome desk. Outside security cameras then show him sprinting off into the night. Mr Molins described the suspect as a European between 35 and 40 years old around 1.7m to 1.8m tall with close-cropped greying hair covered by a cap, a two to three-day beard. He said he could be wearing a "three-quarter length khaki jacket," a green jumper or a sleeveless bomber jacket. In all sightings, he was wearing the same green trainers with white soles. He said police had failed to identify the individual and had no clear idea of what drove him to commit such attacks. There climate of fear has remained in Paris, after the initial attack. A 33-year-old man was left in a critical condition when the lone intruder shot him in the chest and stomach with a pump-action shotgun at 10.15am local time on Monday morning in the lobby of Libération's offices, in the 3rd arrondissement. The newspaper said it was the injured man's first day at work as a freelancer for Next, a supplement of the newspaper. The gunman fled the scene. Less than two hours later, a man also opened fire outside the towers of Societe Generale bank at Paris" business district of La Défense. Francisco Alvarez, standing near Société General, said: "I saw this guy with a cap and a shotgun, a pump-action shotgun, in his hand. Shortly after the shooting in La Défense, a man took a 65-year old motorist hostage nearby and reportedly shouted: "I've escaped from prison, take me to the Champs (Elysées)!" In shock, only when he got home and saw news reports about the gunman did the man contact the police. Subsequent reports said the gunman then may have then slipped into the metro to evade police. "I was just arriving for work and I saw a man lying on the ground, holding his stomach and with blood everywhere," Libération journalist Anastasia Vecrin told AFP. Nicolas Demorand, an executive at Libération, said staff at the left-leaning newspaper - founded by Jean-Paul Sartre, the philosopher - were in shock. He condemned rising a climate of rising violence in France, in particular towards journalists. Later, the daily announced that the service was up and running again by mid-afternoon. It is not known if there was any link to the shooting and the cyberattack. A police security cordon was erected around Libération's editorial offices while police were protecting the Paris offices of several national media outlets.