A state of confusion prevails in the Qaeda-affiliate movement Al-Shabab al-Mujahideen, in Somalia, after the killing of one of its top commanders, Abdi Nur Mahdi, by a United States drone strike last month, Islamist Gate reported on Friday. The Somali government has confirmed that the group's chief of intelligence, security planning and external operations, was killed in an air strike on January 31. He was the group's third chief of intelligence to be killed in U.S. raids. Mahdi, dubbed Yusuf Dheeg, was accused of planning the 2013 attack on a Nairobi shopping mall, which killed 67 people. He succeeded Tahlil Abdul Shakour as chief of intelligence in December 2014. Dheeg was killed by Hellfire missiles launched by U.S. drones, according to Pentagon press secretary, Admiral John Kirby, who said that this operation, like its predecessors, stemmed from the US commitment to the Somali people and government. Experts say that Dheeg's death would affect the movement's ability and eliminate its terrorist operations inside and outside Somalia. Somali intelligence told Reuters earlier this week that Dheeg was not the only loss Al-Shabab had sustained. The U.S. raid killed another senior member of the group. Al-Shabab is a militant group that took control of the Somali capital, Mogadishu, and southern Somalia, but was driven out of the capital in 2011, by a military offensive led by Somali and African Union forces. Al-Shabab aims at toppling the Western-backed Mogadishu government and imposing its version of Islamic law.