It's not yet clear if anyone has been hurt after a multi-vehicle collision in the city's west end.
Ottawa Police say this happened on Fallowfield Road between Eagleson and Old Richmond, where drivers have reported black ice and blowing snow making for poor conditions.
They're asking drivers to avoid the area entirely.
This comes along with the first major snowfall of the season. Environment Canada said, as of Sunday evening when the crash occurred, six centimetres of snow had already accumulated on the ground.