Paris: A day after deadly attack at a French satirical magazine in Paris, a mosque was attacked in Le Mans, west of the French capital on Thursday.

Media reports quoted French police officials as saying that grenades were thrown at the mosque.

Earlier in the day, a woman police officer was killed and a street sweeper were shot and gravely wounded at the southern edge of Paris, in a pre-dawn attack. French Interior Minister Bernard Cazeneuve cautioned against jumping to any conclusions about the attack, which has not been linked to the assault on the newspaper Charlie Hebdo, in which 12 people were killed yesterday.

In the Thursday shooting, he said the officer had stopped to investigate a traffic accident when the firing started. Paris police said the second victim was a street sweeper.

"There was an officer in front of a white car and a man running away who shot," said Ahmed Sassi, who saw the shooting from his home nearby.

France is on its highest level of alert after the deadly attacks at Charlie Hebdo's central Paris offices.

Fresh shooting in Paris: Watch live

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