Updated at 5pm with EWA statement.
Part of a road that runs through the Chadwick Lakes site has collapsed, the Mtarfa local council warned motorists early on Monday.
The collapse seems to have taken place throughout the night, which was once again characterised by a continuous downpour.
It follows a very wet week, with the Meteorological Office saying it had measured a month’s worth of rain in just a few days in Malta.
It is not yet clear who is responsible for the safety and upkeep of the road.
When contacted, an Infrastructure Ministry spokesperson asked Times of Malta to contact Infrastructure Malta about this issue.
But an IM spokesperson said the agency did not recently carry out any work on that part of the road.
Wied il-Qlejgħa, more commonly known as Chadwick Lakes, recently underwent a revamp.
Among others, Infrastructure Malta embellished a twin-arch stone bridge that was built in the late 19th century, when the Chadwick Lakes were formed by British engineer Sir Osbert Chadwick.
An IM spokesperson told Times of Malta it did not carry out any work on the part of the road that collapsed.
Later, replying to questions sent via email, a spokesperson said that according to the law, the upkeep of the road in question was a local council responsibility.
Following the collapse IM helped close off the road and erect signs to divert motorists.
The spokesman said no further works were being planned or implemented by IM in the area.
The Energy and Water Agency also carried out restoration works in the area, with Chadwick Lakes farmers complaining that they have been left with no access to their land after it turned a rural road into a footpath as part of a regeneration scheme.
It is understood that the road was last paved around 10 years ago and government sources say EWA's work was only linked to fencing, the building of a rubble wall and clearing of debris on the valley bed that accumulated over 60 years.
EWA’s regeneration project was mainly focused on the upper stream of the valley, while the road that collapsed is situated along the lower stream.
Sources said EWA and IM were in discussion over a solution with the least impact on the public and the farmers using this road.
They added that the collapse of the road, which is built on clay, was mainly caused by deteriorating weather conditions over the past days.
In a statement issued on Monday evening, the EWA said it was in talks with the Environment and Resources Authority for repair works to be carried out.
The EWA said a preliminary review of the site showed the damage was likely caused by a build-up of pressure from the large volume of water which collects in the area.
A police report has been filed and the road is temporarily closed.
Part of the road off Chadwick Lakes collapsed overnight. Photo: Jonathan Borg'Stop removing police tape'
Environmental activist Cami Appelgren is meanwhile urging people not to remove police tape that was put up to keep pedestrians out of dangerous pathways in Chadwick Lakes.
She told Facebook followers that she spent Sunday evening putting back tape in the area.
"When you see warning tape, plastic cones and police tape - don't remove them! You're risking other people's lives... I understand that you might not understand the risk ahead, but can you at least trust that police tape isn't used for nothing? And maybe not break it and throw it in the water?"
Lack of serious planning - PN
In a statement on Monday afternoon, the PN flagged the Chadwick Lakes road collapse and further works on Triq Sant' Antnin in Għajnsielem as "lack of serious planning by the government".
The party said the Chadwick Lakes collapse happened soon after a €5 rehabilitation project in the area.
In Gozo, Triq Sant' Antnin had been dug up less than a year after being inaugurated to carry out work on underground services.