Firefighters were busy cleaning up diesel fuel, this morning, from the Toys "R" Us parking lot on Merivale Road.

Investigators say a tractor trailer was pulling into the parking lot just before 8 a.m. when it drove over a catch basin rupturing the vehicle's tank.

About 600 litres of fuel spilled from the tanks, some of it getting in the city of Ottawa sewer system. Crews were able to contain the spill and are pumping it out further downstream.

The Toys "R" Us remains open.