DMK on Tuesday (March 19) withdrew its support to the UPA and pulled out its five central ministers over the issue of alleged human rights violations of Tamils in Sri Lanka but the Congress-led government said there was no threat to its stability. DMK supremo M Karunanidhi while announcing the party's decision ending its nine-year long association with the UPA, however, kept a window open of returning to the alliance, saying it was ready to reconsider it if Parliament adopts a resolution before March 21 incorporating the two amendments he had suggested to be moved on the US-backed resolution at the UN Human Rights Commission (UNHRC).