Promising not to tolerate extremists using his country as a base to attack India, Pakistani Prime Minister Yusuf Raza Gilani has urged Washington to help ease tensions with its neighbour. But he also sought more evidence about Laskar-e-Taiba's (LeT) before acting against the Pakistan based group blamed for the November 2008 Mumbai attacks that killed 166 persons.

Pakistan had banned Let and frozen their bank accounts, Gilani told reporters Monday confirming that President Barack Obama had raised the issue of action against LeT relaying concerns from Prime Minister Manmohan Singh.