A policewoman was killed in an early morning shooting Thursday on the southern fringes of Paris, French authorities said, though it wasn’t clear whether the incident was linked to Wednesday’s deadly terrorist attack on a French satirical newspaper that left 12 dead.

According to the Associated Press, the police officer stopped to investigate a traffic accident in the southern suburb of Montrouge when an unidentified assailant opened fire, wounding her and a nearby street sweeper. She later died.

“There was an officer in front of a white car and a man running away who shot,” Ahmed Sassi, who saw the shooting from his house, told AP. “It didn’t look like a big gun because he held it one hand.” The shooter wasn’t wearing a mask, he added, but wore dark clothes.

Police officials, who spoke on the condition of anonymity, told France 24 it was too early to know whether Thursday’s shooting had any connection to the attack on the newspaper Charlie Hebdo. The massacre elicited worldwide condemnation and sparked a sprawling manhunt for the two suspected gunmen, who remain at large.

The policewoman was the third Paris cop to be slain in two days, following the killings of two police officers in Wednesday’s attack on Charlie Hebdo.