Prime Minister Manmohan Singh has expressed India'sconcern over Pakistan's continued inaction in bringing the perpetrators of the 26/11 Mumbai attacks to justice contrary to its assurances.

"No they haven't done enough," he told CNN television in an interview telecast as he landed in Washington for a four-day state visit Sunday. Manmohan Singh said when he met Pakistan Prime Minister Yousuf Raza Gilani in Sharm-el-Sheikh, Egypt, in July this year, he (Gilani) had assured that his government would do all that's possible to bring the perpetrators to justice. "That's not happening."