Scribbled notes from Taliban leader Mullah Mohammad Omar have surfaced in mosques all over Afghanistan's ethnic Pashtun heartland, threatening death to anyone who takes up a government offer to negotiate for peace, according to a longtime Taliban member. Trying to quash rumors of a break in their ranks, the Taliban also have vehemently denied reports including one by The Associated Press that representatives of the militant group were involved in negotiations with the Afghan government. The leadership could be worried that commanders might strike separate deals that would threaten to undermine the insurgency and cripple the morale of their rank-and-file fighters.