Kenya military names Westgate mall attack suspects 5 October 2013 Last updated at 17:09 New CCTV footage shows armed men carrying weapons and searching areas leading off a storeroom Four men believed to have been involved in the deadly shopping centre attack in Nairobi last month have been named. The Kenyan military said Abu Baara al-Sudani, Omar Nabhan, Khattab al-Kene and Umayr - shown in new CCTV footage - were killed during the standoff. Kenya said previously 10-15 militants had been involved, but the police chief says the figure may now be four to six. The al-Shabab group said it carried out the attack on the Westgate mall on 21 September, leaving at least 67 dead. The al-Qaeda-linked group said the attack was in retaliation for Kenya's military involvement in Somalia. Too early? The naming of the men came as CCTV footage was aired showing four attackers calmly walking through a room in the mall holding machine guns. Kenya Defence Forces spokesman Maj Emmanuel Chirchir told Reuters news agency: "I confirm these were the terrorists; they all died in the raid." Reuters quoted Maj Chirchir as saying that al-Sudani was an "experienced fighter" from Sudan and was believed to be the leader of the group. Maj Chirchir said Nabhan was a Kenyan of Arab origin and al-Kene a Somali linked to al-Shabab. Further details about Umayr had not yet been verified, he said. A Kenyan security analyst told the BBC that at least two of the names would be familiar to the Kenyan intelligence services. Kenyan police chief David Kimaiyo told Kenya's KTN television station it was now believed that four to six gunmen had carried out the attack, not 10-15. "None of them managed to escape from the building after the attack," he said. Kenya had earlier said five attackers were killed in the security operation and that nine people were in custody. The BBC's Gabriel Gatehouse in Nairobi says the latest CCTV footage is from a limited part of the complex and, with some eyewitnesses reporting a two-pronged attack, it is too early to say definitively how many gunmen were in the building. In addition to the 67 people killed in the attack, a further 39 are still missing, according to the Kenyan Red Cross. On Saturday, Islamist fighters in southern Somalia said Western forces had launched a night-time raid on one of their bases. No-one has admitted the attack. US and French special forces have carried out raids in Somalia in recent years. It is not clear whether the raid was linked to Westgate.