India postponed the talks after last week's train bombings in Mumbai, which have left about 180 people dead.
It said the environment was not favourable for a meeting this week to review the third round of talks.
Indian Prime Minister Manmohan Singh has said the peace dialogue "suffered" because of the attacks in Mumbai.
Pakistan has said linking the Mumbai bombings with the talks is incongruous, especially as both sides had stated they would not let terrorism derail the peace process.
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