TOPEKA, Kan. (AP) — Authorities say they have contained a hazardous material spill in a Topeka creek and determined it posed no threat.

The Topeka Fire Department’s hazardous materials team responded around 3:30 p.m. Saturday to Shunga Creek. Topeka fire shift commander Cindy Holt says the city’s water pollution division and the state’s fire marshal investigated the spill, determining it to probably be some sort of gasoline, likely diesel fuel.

Holt says she isn’t sure when the substance will be cleaned up. Officials will be back out to continue the investigation and attempt to pinpoint what caused the spill and its source.