Quebec City officials said experts will be on this Charlesbourg district site Friday to find out what's causing sinkholes.

Officials in Quebec City are trying to figure out what's caused dozens of sinkholes to appear in a north-end neighbourhood.

They served evacuation papers on Wednesday to about 15 homes and one business in the city's Charlesbourg district.

Almost 40 holes between five and eight metres wide appeared in the last week. The holes were mostly found in a field, but another was in a resident's driveway. One is big enough to fit a car.

"The field is is like, there is nothing, no trees or anything and you see everywhere some holes, some deeper than others, like 30 or 40 holes everywhere on the field. You can see this is not normal. You can see this is a problem on this land," said city spokesperson François Moisan.