The locomotive of a cargo train derailed in northern Colorado early Wednesday, spilling hundreds of gallons of diesel, authorities said.

The Great Western Railway locomotive did not tip over when it went off the rails at a switch in the tracks just before 1 a.m. but a fuel tank was punctured, the Loveland Fire Rescue Authority said in a Facebook post. The spill was contained and did not get into any waterways, it said.

No one was injured in the derailment, which happened near a sugar factory in an area not far from some homes, Battalion Chief Kevin Hessler said. The other locomotive and three cars carrying sugar did not derail, he said.