Pattali Makkal Katchi founder Dr S Ramadoss on Tuesday met Congress president Sonia Gandhi [Images] in New Delhi [Images] and expressed concern over the killing of innocent Tamils in Sri Lanka [Images].

The Centre should not be a silent spectator to the suffering of Tamils in Sri Lanka, Ramadoss told Gandhi.

The Sri Lankan Tamil issue has come to the forefront of national politics after Bharatiya Janata Party leader L K Advani [Images] participated in a rally organised by Vaiko in New Delhi last week.

Popular Tamil hero Sarath Kumar is also organising a sit in dharna, to protest on the same issue, in New Delhi on February 25.