Afghan President Hamid Karzai talks with a victim wounded in yesterday's suicide bomb attack during an Ashura mourning procession, during a visit at the Emergency Hospital in Kabul, December 7, 2011. Karzai on Wednesday blamed a Pakistan-based group for bomb attacks in three Afghan cities that killed at least 59 people on Tuesday, an allegation that could stoke new tensions with Islamabad. The blasts were the worst sectarian attacks in Afghanistan since the fall of the Taliban government. The largest explosion, at a shrine in the heart of Kabul, killed 55. REUTERS/S. Sabawoon/Pool (AFGHANISTAN - Tags: CIVIL UNREST POLITICS)

Afghan President Hamid Karzai talks with journalists after visiting victims at the Emergency Hospital in Kabul, December 7, 2011. Karzai on Wednesday blamed a Pakistan-based group for bomb attacks in three Afghan cities that killed at least 59 people on Tuesday, an allegation that could stoke new tensions with Islamabad. The blasts were the worst sectarian attacks in Afghanistan since the fall of the Taliban government. The largest explosion, at a shrine in the heart of Kabul, killed 55. REUTERS/S. Sabawoon/Pool (AFGHANISTAN - Tags: CIVIL UNREST POLITICS)

Afghan President Hamid Karzai talks with journalists after visiting victims at the Emergency Hospital in Kabul, December 7, 2011. Karzai on Wednesday blamed a Pakistan-based group for bomb attacks in three Afghan cities that killed at least 59 people on Tuesday, an allegation that could stoke new tensions with Islamabad. The blasts were the worst sectarian attacks in Afghanistan since the fall of the Taliban government. The largest explosion, at a shrine in the heart of Kabul, killed 55. REUTERS/S. Sabawoon/Pool (AFGHANISTAN - Tags: CIVIL UNREST POLITICS)

Afghan President Hamid Karzai talks with journalists after visiting victims at the Emergency Hospital in Kabul, 7 December 2011. Karzai on Wednesday blamed a Pakistan-based group for bomb attacks in three Afghan cities that killed at least 59 people on Tuesday, an allegation that could stoke new tensions with Islamabad. The blasts were the worst sectarian attacks in Afghanistan since the fall of the Taliban government. The largest explosion, at a shrine in the heart of Kabul, killed 55. REUTERS/S. Sabawoon/Pool (AFGHANISTAN - Tags: CIVIL UNREST POLITICS)

Afghan President Hamid Karzai talks with journalists after visiting victims at the Emergency Hospital in Kabul, 7 December 2011. Karzai on Wednesday blamed a Pakistan-based group for bomb attacks in three Afghan cities that killed at least 59 people on Tuesday, an allegation that could stoke new tensions with Islamabad. The blasts were the worst sectarian attacks in Afghanistan since the fall of the Taliban government. The largest explosion, at a shrine in the heart of Kabul, killed 55. REUTERS/S. Sabawoon/Pool (AFGHANISTAN - Tags: CIVIL UNREST POLITICS)

Afghan President Hamid Karzai kisses the head of an Afghan girl who was wounded in yesterday's suicide bomb attack during an Ashura mourning procession, as he visits victims at the Emergency Hospital in Kabul, December 7, 2011. Karzai on Wednesday blamed a Pakistan-based group for bomb attacks in three Afghan cities that killed at least 59 people on Tuesday, an allegation that could stoke new tensions with Islamabad. The blasts were the worst sectarian attacks in Afghanistan since the fall of the Taliban government. The largest explosion, at a shrine in the heart of Kabul, killed 55. REUTERS/S. Sabawoon/Pool (AFGHANISTAN - Tags: CIVIL UNREST POLITICS TPX IMAGES OF THE DAY)

Afghan President Hamid Karzai talks with a victim wounded in yesterday's suicide bomb attack during an Ashura mourning procession, during a visit at the Emergency Hospital in Kabul, December 7, 2011. Karzai on Wednesday blamed a Pakistan-based group for bomb attacks in three Afghan cities that killed at least 59 people on Tuesday, an allegation that could stoke new tensions with Islamabad. The blasts were the worst sectarian attacks in Afghanistan since the fall of the Taliban government. The largest explosion, at a shrine in the heart of Kabul, killed 55. REUTERS/S. Sabawoon/Pool (AFGHANISTAN - Tags: CIVIL UNREST POLITICS)

Afghan President Hamid Karzai talks with a victim wounded in yesterday's suicide bomb attack during an Ashura mourning procession, during a visit at the Emergency Hospital in Kabul, December 7, 2011. Karzai on Wednesday blamed a Pakistan-based group for bomb attacks in three Afghan cities that killed at least 59 people on Tuesday, an allegation that could stoke new tensions with Islamabad. The blasts were the worst sectarian attacks in Afghanistan since the fall of the Taliban government. The largest explosion, at a shrine in the heart of Kabul, killed 55. REUTERS/S. Sabawoon/Pool (AFGHANISTAN - Tags: CIVIL UNREST POLITICS)

Afghan President Hamid Karzai talks with victims wounded in yesterday's suicide bomb attack during an Ashura mourning procession, during a visit at the Emergency Hospital in Kabul, December 7, 2011. Karzai on Wednesday blamed a Pakistan-based group for bomb attacks in three Afghan cities that killed at least 59 people on Tuesday, an allegation that could stoke new tensions with Islamabad. The blasts were the worst sectarian attacks in Afghanistan since the fall of the Taliban government. The largest explosion, at a shrine in the heart of Kabul, killed 55. REUTERS/S. Sabawoon/Pool (AFGHANISTAN - Tags: CIVIL UNREST POLITICS)

Afghan President Hamid Karzai kisses the head of an Afghan girl who was wounded in yesterday's suicide bomb attack during an Ashura mourning procession, as he visits victims at the Emergency Hospital in Kabul, December 7, 2011. Karzai on Wednesday blamed a Pakistan-based group for bomb attacks in three Afghan cities that killed at least 59 people on Tuesday, an allegation that could stoke new tensions with Islamabad. The blasts were the worst sectarian attacks in Afghanistan since the fall of the Taliban government. The largest explosion, at a shrine in the heart of Kabul, killed 55. REUTERS/S. Sabawoon/Pool (AFGHANISTAN - Tags: CIVIL UNREST POLITICS TPX IMAGES OF THE DAY)