President says planners of assault claimed by al-Shabaab will be relentlessly pursued

• Briton and American among those killed in attack
  

Kenya’s president has vowed to relentlessly pursue anyone involved in the Nairobi hotel complex attack, as new details of the 16-hour siege emerged and investigators tried to trace 50 people who are still missing.

Twenty-one people have so far been confirmed dead, including 11 Kenyans, a Briton and an American, as well as five attackers. The figure is expected to rise.

Western officials frustrated by lack of response ahead of assault that killed 14 in Nairobi

Intelligence services in Kenya were warned that al-Shabaab was planning terrorist attacks on high-profile targets in the east African country around Christmas and the new year, western and regional security officials have said.

Officials and other sources told the Guardian the warnings had been passed on several times in recent months, adding that they had been frustrated not to see a greater response from Kenyan authorities.

US citizen confirmed among those killed in assault claimed by militant Islamist organisation al-Shabaab

Police and anti-terrorist forces have regained control of a Nairobi hotel and office complex, hours after Islamist extremist gunmen launched an attack that is thought to have killed at least 15 people, including a US citizen.

The assault on the dusitD2 compound in the Kenyan capital, which includes a luxury hotel, restaurants, a spa and several office buildings housing international companies, was the most outrageous by terrorists in the country for many years.

Amateur footage captured people escaping a terror attack in the Kenyan capital.  At least seven people had been reported killed and one suspect detained. At least 10 more were wounded.  Militant Islamist organization al-Shabaab claimed responsibility for the armed assault