Westgate siege: Four accused refused bail in Nairobi 4 December 2013 Last updated at 10:05 A Kenyan court has denied bail to four people charged over the attack in September on the Westgate shopping centre in the capital, Nairobi. The court ruled they could not be bailed because of security fears and possible interference in the case. The four, said to be foreigners, are accused of aiding those who launched the attack, in which 67 were killed and 200 injured. They deny the charges. The al-Qaeda-linked al-Shabab group said it had carried out the attack. The men charged have been named as Mohammed Ahmed Abdi, Liban Abdullah, Adnan Ibrahim and Hussein Hassan. Suspected attackers On 22 September Somali militant group al-Shabab says it carried out the attack Officials initially said 10 to 15 attackers were involved, but CCTV shows only four men Authorities have released the names or nicknames of four suspects they say were killed in the siege: Abu Baara al-Sudani, Omar Nabhan, Khattab al-Kene and Umayr One is believed to be Somali-Norwegian Hassan Abdi Dhuhulow Bodies of at least three attackers recovered from the rubble Not clear if any attackers escaped Their nationalities have not been disclosed, but they are said to be ethnic Somalis. In addition to aiding a terrorist group, they are also accused of being in Kenya illegally. Sheltering gunmen They are the first to be charged over the four-day siege - one of the deadliest militant attacks carried in East Africa. The police say the four accused had sheltered the attackers in their homes in Eastleigh - a Somali district of Nairobi - and that they had been in contact with the gunmen four days before the siege. None of the men are accused of being the gunmen in the shopping centre. The Kenyan army has said that all four of the attackers died during the siege. One of the suspected attackers has been named as 23-year-old Somalia-born Norwegian national, Hassan Abdi Dhuhulow.