President Hamid Karzai accused Pakistan of interfering in Afghanistan's internal affairs, Online reported on Monday. Radio Tehran quoted Karzai as telling a religious council that Islamabad was backing the anti-Kabul elements. Karzai alleged that Pakistan had threatened the Taliban with handing over their families to the US if they did not fight against Afghanistan. Meanwhile, an Afghan official told the Associated Press that the Afghan government was extremely angry at what he called a "lack of cooperation" from Islamabad in stopping militants from crossing the border. The Afghan official said Pakistan's lack of resolve was a factor in both the assassination plot of US envoy Zalmay Khalilzad, and an upsurge in violence across Afghanistan that has left hundreds dead. "We have always believed that if we got cooperation from Pakistan, this violence wouldn't be happening," he said. "These militants are getting support from people in Pakistan, and we are not convinced when Islamabad says it can't control them."