A police officer trapped in a stalled car was slightly injured in one of the incidents on Friday night, the prefecture of the Yvelines region said. The female officer, reportedly pulled from her car and hit in the face in Chanteloup-les-Vignes, was hospitalized overnight and released, the prefecture said.

The clashes in Chanteloup-les-Vignes and nearby Mureaux, both in the Yvelines region west of Paris, recalled rioting in housing projects in 2005 that spread through the country. Bus burnings broke a general calm on the first anniversary of the riots last fall.

On Friday night, youths forced a bus driver out of his empty bus in the Noe housing project in Chanteloup-les Vignes before setting it afire, officials said. When police arrived, clashes with the youths began.

Some 15 youths masked and armed with Molotov cocktails also went after several police officers as they headed home. Thierry Couture, head of public safety for Yvelines, said they retreated after they realized they were outnumbered. However, the female officer’s car stalled and they went after her. She called in reinforcements but not before being injured in the face and wrist.

No arrests were reported in Chanteloup-les-Vignes.

In Mureaux, clashes erupted for a third night Friday after police moved in on youths throwing objects. Despite heavy security, including riot police, five cars were reported burned, the prefecture said. Three people were detained for questioning following the incidents.

Less serious confrontations were reported in Mureaux on Wednesday and Thursday nights, French media reported.