The corrosive spill in Marsa earlier this week could damage car paint and undercarriages, according to RMF director Patrick Rausi.
The spill, which covered a major part of Aldo Moro Road on Monday, came from a nearby factory and is believed to have been an acid used in galvanisation.
It caused a three-hour traffic jam and a number of bumper-to-bumper collisions along the busy arterial road.
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