Paris, Dec 13 (IANS): A person who was injured during a shooting at a Christmas market in French city of Strasbourg has died, raising the death toll to three, authorities said on Thursday.

Thirteen people remained injured following the Tuesday evening attack, five of them seriously including a man described as brain dead, the Prefecture said in a statement cited by Efe news.

The French police appealed for help in finding 29-year-old Chérif Chekatt who opened fire in Strasbourg before making a getaway and going on the run. Hundreds of security personnel were searching for him on both sides of the Franco-German border.

He has a gunshot wound to the elbow, but remains armed and on the run 36 hours after the attack.

The suspect has a string of criminal convictions and became a radical Islamist while in prison, the police said, adding that he was highly dangerous and should not be approached.

Chekatt had been in jail in Germany as well as France, and according to German reports he may have received a call from Germany shortly before the Strasbourg attack.

He did not answer the call, but investigators were trying to establish who was behind it, reports said.