Terrorism authorities to probe Paris stabbing

French authorities have opened a terrorism investigation after a knife-wielding assailant killed one person and injured four others in the centre of Paris.

The Paris prosecutor says counterterrorism authorities are investigating Saturday's attack in a busy neighbourhood of Paris' Right Bank. The alleged attacker was killed by police.

Prosecutor Francois Molins said witnesses reported that the suspect shouted ``Allahu Akbar,'' or ``God is great'' in Arabic.

Molins told reporters that based on the method of the attack, counterterrorism authorities are leading the investigation on potential charges of murder and attempted murder in connection with terrorist motives.

The Islamic State group news agency claimed the suspect as one of its ``soldiers'' on Saturday night.