Chennai: Anti-Koodankulam Nuclear Power Project activists will observe a fast and hoist black flags atop their houses for three days protesting Prime Minister Manmohan Singh's visit to Russia.

PM is likely to finalise KNPP units-3 and 4 during the visit.

"The PM's visit to discuss units-3 and four while we are protesting against units 1 and 2 is adding insult to injury," SP Udayakumar, Co-ordinator, People's Movement Against Nuclear Energy (PMANE), spearheading the stir, told on Wednesday.

The three-day protest will be in addition to the ongoing protest at Idinthakarai, he said, adding, all houses, shops, temples, churches and boats in Koodankulam and Chettikulam areas will hoist black flags from Dec 16.

PMANE also requested Tamil Nadu Chief Minister Jayalalithaa to pass a resolution for scrapping KNPP, along with the resolution on Mullaperiyar reservoir issue during the special assembly session convened on Thursday.

"Mullaperiyar issue itself is the manipulation of the Centre to divert (attention) from the Koodankulam issue. So, we request the Chief Minister to pass the resolution along with the one on Mullaperiyar on Thursday," he said.

The Indo-Russian joint venture has run into trouble with locals demanding scrapping of the project citing safety concerns in the wake of the Fukushima disaster.

Singh leaves for Moscow on Thursday on a three-day visit where he is expected to sign nine agreements.