Taliban leader Mullah Omar is promising more violence over the coming year, even as the US plans to deploy thousands more troops in hopes of turning around the deteriorating war in Afghanistan. In a statement posted Sunday on a militant-linked Web site, Omar also rejected President Hamid Karzai's calls for peace talks until foreign troops leave the country. Afghanistan is going through its most violent period since the Taliban was ousted in the U.S.-led invasion in 2001. Omar released his message at the start of Muslim holiday of Eid al-Adha, or the ''Feast of the Sacrifice.''