Here are 10 things to know about al-Shabab, the Somali Islamic extremist group that has claimed responsibility for the attack on Kenya's premier shopping mall that killed dozens of civilians.

Officials investigating the Westgate Mall attack in Kenya now know the real names of all four gunmen.

Men in fatigues walked out of a store in Nairobi's Westgate Mall like ordinary shoppers, holding plastic bags heavy with unknown items after Islamic extremists staged an attack.

U.S. special forces captured a Libyan al-Qaida leader linked to the 1998 bombings of two American embassies in Africa, seizing him outside his Tripoli home and whisking him out the country.

U.S. Navy SEALs carried out a pre-dawn raid Saturday on a coastal town in southern Somalia looking for a specific al-Qaida suspect linked to the Nairobi shopping mall attack, but did not get their target, a U.S. military official told The Associated Press.

Al-Shabab's decision to use small arms, instead of explosives, made possible the most deadly terrorist attack in Kenya since the 1998 bombing of the United States embassy.

Kenya's military spokesman confirmed the names of the four attackers implicated in the four-day-long siege at the Westgate Mall.

A Canadian teen is recovering in a Toronto hospital after surgery on her leg, severely injured in a deadly mall attack in Kenya.

39 people remain unaccounted for almost a week after the end of the four-day terrorist attack on Nairobi's Westgate Mall that killed at least 67, Kenyan Red Cross said Monday.

How the Kenya mall attack and a passport scam tied to the "White Widow" are spurring South Africa to tighten security measures.