Bengaluru: On Tuesday due to rising pollution levels in the lake, there are thousands of dead fish surfaced in Bengaluru's popular Ulsoor Lake.

According to residents, cause of the death of fish is that sewage water often finds its way into the lake, cutting down oxygen levels drastically.

Yakub, localite said, "Recently it rained heavily, so you can see that there were lot of sewage sludge and plastic again that has entered into the eight acres plus Ulsoor Lake. So, again you can see that there's mass fish deaths".

Pollution board members collected samples of the lake water which will be sent for testing to ascertain the exact cause of the deaths.

Tirumurthy, a member of the board, said, "We are collecting the samples. It will be investigated and the report will be submitted to our head office in Delhi and MoEF (Ministry of Environment and Forests)".

The dead fishes were lying along with plastic bottles and garbage near the lake.

This is the second time in as many months that thousands of dead fish have been seen around the lake, leading to a strong stench in the area.