Elections Canada says it has relieved three Quebec City election officials of their duties after three boxes containing hundreds of ballots from advance polls were reported missing on the weekend.

The officials, all members of the same family who serve as deputy returning officers, said they were not aware Elections Canada was looking for the boxes, which had been used during advance polling. The boxes were returned on Sunday night.

Elections Canada said the integrity of the boxes was not compromised, so the votes from the Oct. 3-6 advance polls can be counted.

No decision has been made whether the three officials will face charges.

Elections Canada had asked the officials to take ballot boxes home from advance polls earlier this month in the riding of Québec, but following media reports that some of the boxes had damaged seals, the local returning officer ordered the boxes be returned on Saturday. It was then that officials realized three boxes were missing.