An explosion on a busy street in the French city of Lyon has wounded at least 7 people Friday, prosecutors say.

Prosecutors said a package bomb is suspected, according to Agence France-Presse.

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Police in France initially wrote on Twitter that 8 people suffered minor injuries, but French officials later lowered the number to 7. Kamel Amerouche, the regional authority's communications chief, told The Associated Press the victims had leg injuries.

“The prefect of the region and the Prosecutor of the Republic are on site,” a tweet said.

Police said the explosion took place around 5:40 p.m. at the corner of Victor Hugo Street and Sala Street in the southeastern French city, which is in the heart of Lyon, and a security perimeter has been set up. Police asked residents to avoid the area.

The package contained "screws or bolts" and was placed in front of a bakery on the corner of the two popular streets, police sources told AFP.

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A man was reportedly seen arriving to the area on a bike before leaving what looked like a package or suitcase at the scene, The Local reported, attributing reports in the French press. Police are reportedly still looking for that man.

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French President Emmanuel Macron called the Lyon blast an “attack” and added that there have been no deaths “for the time being,” according to AFP. He also sent his thoughts "to the injured and their families."

The heart of Lyon, the Presqu'ile, lies between the Rhone and Saone rivers that run through France's third-largest city.

The Associated Press contributed to this report.