The 27-year-old photographer who was seriously wounded by a still-at-large gunman in the Paris offices of daily Libération was on his first day of work as assistant for the magazine Next, according to the editorial manager Fabrice Rousselot.

The victim, who was hit in the thorax and the stomach, was in "critical condition" at the Hospital Pitié-Salpêtrière.

A manhunt has been launched in central Paris for a "calm and determined" man in his 40s. He has been described as having a shaved head and wearing a long green coat and bullet-proof vest.

After the Libération shooting, the gunman fired shots in the air outside the headquarters of French bank Societe Generale in the La Defense business district.

French authorities announced that they were treating the incident as a terrorist case.

The Libération shooting came three days after a man broke into the Paris HQ of business channel BFMTV and fired several bullets before escaping. No-one was wounded in the incident but the gunman warned a senior editor: "Next time, I will not miss you."

According to authorities, the man was caught on CCTV and appears to be the same as the suspect in today's shootings.

French newspaper Le Parisien has published the first picture of the gunman from the surveillance camera of BFMTV.

The suspect is seen with a cap, a bullet-proof vest and a rifle in his hands.

Other pictures of the suspect
Other pictures of the suspect (Twitter: Jean-Paul Ney/ @jpney)