Mullah Omar must denounce violence, says Karzai
``He must come up and speak for peace, accept the Afghan constitution, denounce violence, and say that he's not enemies with the rest of the world, that he wants to co-exist with the rest of the world,'' Karzai told the PBS news channel in an interview.
Afghan president Hamid Karzai called on Taliban fighters today to lay down their arms as a massive military operation aimed at neutralising them in a major stronghold got underway.