Environment Agency officials are still trying to establish what caused the deaths of over a hundred fish in a Cwmbran beauty spot.

Members of the public joined Torfaen council staff at Llanyravon Boating Lake on Wednesday as thousands of bream, carp and roach struggled for oxygen.

Worried locals used nets to move around 30 fish into a nearby pond, trying to save as many as possible.

A council official had spotted more than 100 dead fish on the surface of the lake at around 8.30am.

With hundreds more struggling for oxygen, council officials started pumping water into the lake in a bid to provide oxygen.

Three council officers worked overnight, using six pumps to oxygenate the water.

On Thursday morning, fish were still dying as a result of Wednesday’s problems, but a Torfaen council spokesman said the work of officers had put the majority out of immediate danger.

The Environment Agency usually takes up to week to investigate such problems. But it has two officials at the scene and hopes to find a reason, so Torfaen council officials can work to remedy the problem.

Staff continued pumping water into the lake on Thursday night as it remained closed to the public.

A spokesman said: “We will decide the course of action after receiving the results. We may have to flush the lake to remove any possible contaminants.”