KUALA LUMPUR, Sept. 4 -- What looked like snow covering part of the Shah Alam Expressway (Kesas) yesterday afternoon turned out to be soap foam triggered by heavy rain washing up residue from a spill more than a week ago.

The unusual scene stretched about 500 metres between Kilometre 30 and 30.5 of the Klang-bound-to-Kuala Lumpur side of Kesas and was spotted at about 3.10pm.

Shah Alam district police chief Assistant Commissioner Sarudin Samah said initial investigations found the soap residue likely came from a lorry load that spilled on August 24 near the Kota Kemuning slip road before the vehicle entered Kesas heading towards Klang, Kosmo! Online reported.

"When the spill happened, firefighters took action by spreading sawdust along...