Afghan President Hamid Karzai threatened Sunday to send Afghan troops across the border to fight militants in Pakistan, a forceful warning to insurgents and the Pakistani government that his country is fed up with cross-border attacks. Karzai said Afghanistan has the right to self defense, and because militants cross over from Pakistan "to come and kill Afghan and kill coalition troops, it exactly gives us the right to do the same." Speaking at a Sunday news conference, Karzai warned Pakistan-based Taliban leader Baitullah Mehsud that Afghan forces would target him on his home turf. Mehsud is suspected in last year's assassination of former Pakistani Prime Minister Benazir Bhutto. "Baitullah Mehsud should know that we will go after him now and hit him in his house," Karzai said.