Earlier Saturday, ahead of the planned offensive, Pakistani authorities imposed a curfew in the region, an insurgent stronghold near the Afghan border.
Pakistan's army operation in South Waziristan follows a string of attacks, believed to be part of a Taliban campaign, that killed more than 150 people in the last two weeks.
Three suicide bombers attacked a government site in Peshawar Friday, killing at least 13 people, including three police officers, two women and one child.
Agencies
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Putting principles before profits
See also Sydney Irresistible
Putting principles before profits