Paris, France (CNN) -- Police expect on Monday to release the final two people still detained after arrests during riots in Grenoble, France, over the weekend, said Brigitte Julien, police spokeswoman for the Isere regional security department.
"Last night was much calmer," Julien said Monday, after a weekend over which rioters set about 60 cars on fire and injured three policemen.
On Sunday night, four shots were fired at a police vehicle, but no one was injured, Julien said.
She said the violence began on Friday after a local resident, Karim Boudouda, 27, was killed Thursday in an exchange of gunfire with police.
The two jailed people were detained for drug trafficking and carrying firearms, Julien said. She said they would be released after 48 hours of detention.
Journalist Saskya Vandoorne contributed to this report for CNN.