Pakistani officials say a suicide bomber has killed at least seven people near the headquarters of President Pervez Musharraf, in the garrison city of Rawalpindi.Eleven people were reported wounded in the attack.Authorities say the blast occurred at a police checkpoint on a main road in the city, a short distance from President Musharraf's office. The authorities say General Musharraf was safely in his office at the time of the blast.A double suicide attack in Rawalpindi on September 4 killed 25 people, many of them on a Defense Ministry bus.Tuesday's attack also comes less than two weeks after twin suicide bombings in the southern city of Karachi killed nearly 140 people during a procession to welcome former Prime Minister Benazir Bhutto home from eight years in exile.