21:45 First Lady Margaret Kenyatta: "As a society, we are wounded and we weep; but as a nation, we must rise and prevail."
21:40 Foreign Affairs CS Amina Mohamed condemns the "inhumane and vicious" attack on the Westgate Mall in Nairobi.
"The attack is aimed at destroying our democratic values and our way of life," she said in a statement issued by Kenya's UN Mission in New York. But it only goes to strengthen our resolve to fight terrorism and promote peace and justice in our nation."
"Our determination to continue to play an active and constructive role in bringing regional peace and security remains resolute.”
She said the Kenyan government "is determined to bring the siege to a swift conclusion."
21:12 Former Vice President Kalonzo Musyoka: "I urge all Kenyans to remain united against such a horrible attack by cowardly enemies of Kenya. My condolences to families that lost loved ones and quick recovery to those injured."
21:08 The US condemns "this senseless act of violence" at the Westgate Mall in Nairobi.
"Our condolences go out to the families and friends of all victims," State Department spokeswoman Marie Harf said.
21:00 UK Prime Minister David Cameron has spoken to President Kenyatta following the Westgate Mall attack.
20:52 BREAKING: al-Shabaab claims responsibility for Westgate attack. A second attack took place at Mogadishu’s Bakata market at 11am, same time as Nairobi one
20:40 IG Kimaiyo: "1 gunman wounded, while several others pinned down."
20:15 Kenya Police: "We have detained the Westgate Mall attack suspect in hospital."
20:00 Diamond Plaza, a shopping mall in Parklands, temporarily closed as a precaution. Nakumatt closes all its branches in Nairobi for the night.
19:38 "Our security is important. We ask all to cooperate with the security agencies not only now but when they have information they feel can help prevent such tragedies in future," says Mr Ruto.
19:37 Deputy President William Ruto: "The Government will bring the siege to end and will get to the bottom of the attack. We will bring to account the perpetrators and their accomplices."
19:23 At least 39 dead, over 60 injured, Red Cross secretary general Gullet tells Easy Fm.
19:15 The AFP news agency quotes a police officer saying the attack was carried out by a well-organised "terror gang".
19:12 Mr Iringo: "We have also tightened security in all shopping malls in the city and we reassure Kenyans that Govt will not relent on this war."
19:02 Internal Security PS Mutea Iringo: "The government is now fully in charge of the situation. The security services will s