The Afghan Taliban are also providing sanctuary for a prominent Pakistani Taliban commander, Mullah Fazlullah, in eastern Afghanistan's Kunar province, said Shahid. Fazlullah was the commander of the Taliban in Pakistan's northwest Swat Valley but was driven into Afghanistan when the Pakistani army launched a big offensive there in 2009.
The army has also staged many offensives in Pakistan's semiautonomous tribal region, the Taliban's main sanctuary, but the militants have proven resilient and continue to carry out regular attacks.
The Taliban have financed many of these attacks through a combination of kidnappings, extortion and bank robberies. But Shahid's comments indicate these sources of financing do not always provide the funds they need.
The government has more recently stepped up efforts to negotiate a peace deal with the Taliban, but those efforts do not appear to be making much progress.
Shahid reiterated the Taliban's view that peace talks will not succeed unless the government releases all militant prisoners and withdraws the army from the tribal region. He also demanded an end to U.S. drone strikes targeting militants in the tribal region.
The Taliban requested that the reporters not reveal exactly where in Waziristan the interview took place.
Meanwhile, a bomb exploded in northwest Pakistan early Monday, killing six people taking part in an anti-polio campaign, a police officer said.
The bomb went off just as a van drove by carrying security officials who were supposed to protect vaccinators as they went to local houses to administer the anti-polio vaccine, said police official Samiullah Khan.
The incident happened in the village of Malikhel, about 20 kilometers (12 miles) outside the provincial capital of Peshawar. Four police officers and two members of a local peace committee riding in the van were killed, Khan said.
Pakistan is one of three countries in the world where polio is still endemic.
Part of the reason that it is still prevalent is that militants who oppose the campaign often target the workers delivering the vaccine and threaten people who want to get their kids vaccinated. Many Pakistanis also worry about having their children vaccinated because they view the vaccination campaign as a western plot to harm Muslims.
During these vaccination campaigns, teams of polio workers often accompanied by police escorts go door to door in villages and towns to administer the vaccinations. The campaign targeted Monday had originally been scheduled for September, but was delayed over security concerns, said a health official. He did not want to be identified because he was not authorized to speak to the media.
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Associated Press writer Riaz Khan in Peshawar contributed to this report.