Officials say a diesel fuel spill in the Des Moines River in downtown Des Moines has been traced to a rooftop generator at the Iowa Events Center.
The spill was discovered Thursday morning. The Iowa Department of Natural Resources says about 2,500 gallons of diesel flowed down a roof drain from a standby generator on the roof of Hy-Vee Hall. It flowed into a storm drain that led to the river.
Cleanup crews have placed absorbent booms across the river.
DNR spokesman Ted Petersen says there's no danger to the city's drinking water supply. He says the spill is below the city's intake on the Des Moines River and most of the city's water comes from the Raccoon River.