Updated 3.50pm
A historic bastion beneath the Mediterranean Conference Centre has been marred by liquid concrete.
The water-diluted mixture was poured down a water culvert by a contractor carrying out works at the MCC and ended up streaming down the historic bastion in the area known as Taħt iz-Żiemel.
Valletta mayor Aleixei Dingli told Times of Malta that the local council had identified the contractor, fined them and given them 48 hours to clear up the mess.
Dr Dingli said the council had also lodged a report with the Planning Authority, though he had yet to hear back at the time of writing.
Police are investigating.