No indication yet of the gunman's motive.
Shots were fired at the offices of a left-wing French newspaper and outside the headquarters of French bank Societe Generale in Paris on Monday. Police said the same gunman appeared to have carried out both attacks.
There was no indication of the gunman's motive.
The assailant opened fire at the central Paris office of left-wing daily newspaper Liberation, seriously injuring a photographer's assistant shortly before fleeing, police and staff at the newspaper said.
About 90 minutes later, a man opened fire on the street outside Societe Generale's suburban headquarters, wounding no one, police and a spokeswoman for the bank said.
Shortly afterwards, a gunman hijacked a car nearby and forced the driver to drop him on the Champs-Elysees Avenue in central Paris, the driver told police.
French news television channel BFMTV reported that the manhunt in the Champs Elysees area was ongoing. Police would not confirm how many officers had been deployed.
It was unclear if the incident on the Champs Elysees was related to the two shootings, according to police.
A police source said the description of the gunman, armed with a hunting rifle or similar weapon, was similar and the cartridges found after both attacks corresponded.
Liberation managing editor Fabrice Rousselot said witnesses described the attacker as a short-haired man in his 40s.
BFMTV reported that a Soc Gen employee who saw the gunman said he was wearing a white and red parka, and had brown hair.
The wounded person was hit in the chest, a police official said, adding that the motive of the attacker was unclear.
"He walked in, fired twice and left," Rousselot told reporters.
Deputy editor-in-chief Fabrice Tassel said in a tweet that the young male victim was fighting for his life in hospital.
"As long as this person is still on the loose and we do not know the motives, this represents a threat," Interior Minister Manuel Valls told reporters outside Liberation's offices after visiting the scene. "We must move fast."
Liberation's offices near the Place de la Republique in east-central Paris were cordoned off as forensics experts investigated. Police were deployed outside the offices of other media outlets in the French capital.
The mid-morning incidents came days after an armed intruder entered the offices of BFMTV, threatening journalists before disappearing.
French newspaper Le Figaro reported that CCTV from BFMTV and Liberation indicated the incidents were carried out by the same man.
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