Pakistani Taliban militants announced yesterday an indefinite ceasefire in the Swat valley in the northwest of the country, a day after the army said it was ceasing operations in the region.

In the neighboring Bajaur region on the Afghan border, the government announced a four-day ceasefire in response to a unilateral truce called by militants there on Monday.

The ceasefires are likely to compound concerns among Western countries which fear truces allow militants to create sanctuaries in Pakistan where they can regroup and intensify their insurgency against Western forces in neighboring Afghanistan.