Arlington County police and firefighters are on the scene of a reported grease spill in East Falls Church.

A truck leaking a slippery substance has prompted a number of road or lane closures in the area of Lee Highway and Washington Blvd, according to social media reports.

Update at 4:10 p.m. — A fire department radio transmission described the leak as having come from a “sewage truck.”

Update at 4:15 p.m. — A multi-vehicle crash is also being reported in the area.

Update at 4:35 p.m. — A photographer on scene says the grease leaked from a tanker truck containing cooking oil.

@WTOPtraffic accident on left side grease on right. Looking EB pic.twitter.com/IhyBGwZnZ0 — Chief 288 (@Chief288) June 20, 2016

@WTOPtraffic additional info. Multi vehicle AWI now on Lee Hwy btwn Fairfax Dr and Westmoreland. — Chief 288 (@Chief288) June 20, 2016

#ACFD E106 on scene at I-66, at Lee Hgw for a spill from a truck. Substance leaking is proving a hazard to cars. — LincolnACFD (@LincolnACFD) June 20, 2016

@WTOPtraffic road hazard. Lee Hwy, Washington Blvd, Sycamore St. Grease on road. Slippery and lanes closed.#vatraffic — Chief 288 (@Chief288) June 20, 2016

Cops just blocked off the Washington Blvd and Lee Highway AND bike trail that's parallel ??@ARLnowDOTcom — i s a b e l l e (@isabelle_grr) June 20, 2016

Photos (top) courtesy Andrew Pang