Pakistan on Monday angrily denied allegations by Afghanistan's senate chief that President Pervez Musharraf ordered a suicide attack against him, escalating tension between the neighbours. Sebghatullah Mujadidi, also a former Afghan president, made the accusation after he escaped Sunday's bombing with minor injuries. Two attackers and two bystanders were killed. Foreign Office spokeswoman Tasnim Aslam condemned the attack on Mujadidi but rejected his accusation that Pakistan was involved. She pointed out that President Karzai had said that investigations were underway and there was no evidence of who was involved.