Welcome to our live coverage of the standoff at the Westgate shopping centre in the Kenyan capital Nairobi. The centre came under attack on Saturday by Somali militants of al-Shabab resulting in the death of at least 39 people.
Officials say the gunmen have been cornered but that people are trapped in a number of locations. It is not known how many hostages are inside the upmarket centre.
Kenyan security forces are trying to bring an end to the siege.
The BBC's Anne Soy says the night has been relatively quiet with sporadic shooting.
Gunfire has been heard inside the Nairobi shopping centre, and two wounded Kenyan troops have been evacuated, a witness has told the AFP news agency.
Afua Hirsch, West Africa Correspondent for the Guardian, has tweeted: "Also just heard tragic news that #Ghanaian poet Kofi Awoonor among the dead in #Westgate Mall attack #Kenya http://www.ghanabusinessnews.com/2013/09/22/senior-ghanaian-citizen-awoonor-killed-in-kenya-gun-attack/"
Al-Shabab's Twitter account has been suspended.
For a profile of al-Shabab, read our article here.
Casualties of the attack are being treated by Red Cross workers.