The Somali insurgent group al-Shabab is vowing to avenge a U.S. military raid that killed one of Africa's most wanted al-Qaida suspects.

Speaking to reporters Tuesday, senior members of al-Shabab said their fighters will retaliate for the commando raid that killed Saleh Ali Saleh Nabhan.  They also vowed to continue their fight against Western nations.

Witnesses say helicopters fired on a car near the southern Somali town of Barawe Monday, killing at least two passengers and wounding two others.

The U.S. military has confirmed involvement in the raid and says the attack killed Nabhan. His body is now believed to be in U.S. custody.

Nabhan was a Kenyan wanted for questioning about attacks against a hotel and an Israeli airliner in Mombasa, Kenya, in 2002.  

The hotel bombing killed at least 13 people, while missiles fired at the plane missed their target.

Authorities also believe the suspect may have been involved in the 1998 bombing of the U.S. Embassy in Nairobi which killed 218 people, the majority of them Kenyan.

Officials with the International Crisis Group say the precision of Monday's helicopter strike shows the United States has good intelligence in Somalia and was likely tracking Nabhan for a while.

U.S. officials have been quoted as saying the operation Monday was launched when it became clear the target was traveling in an area away from heavy population.

The Barawe area is controlled by al-Shabab, which is fighting to topple the Somali government.  

The United States considers al-Shabab a terrorist organization, and has accused it of having links to al-Qaida and giving refuge to terrorism suspects.

Some information for this report was provided by AFP, AP and Reuters.