Wigneswaran said he will discuss with Wickremeinghe the allegations that former rebels who were released after being rehabilitated were injected with a poisonous drug, Xinhua news agency reported.
The Chief Minister will also discuss concerns over the failure to release Tamil political prisoners being still in detention.
The government said it was prepared to investigate the allegations if the details of such former rebels were submitted to relevant authorities.
Wigneswaran sought US assistance to help probe the issue but Washington had turned down the request.
Minister of National Dialogue Mano Ganeshan said there was no need for Wigneswaran to take the issue to the international community as it could be investigated locally.
