U.S.intelligence analysts say the operatives, Comoros-born Fazul Abdullah Mohammed and Kenyan national Saleh Ali Saleh Nabhan, have eluded capture through the help of al-Qaida's support network in the coastal region of Kenya and in parts of the capital,Nairobi.

VOA: standard.2009.05.01

Fazul Abdullah Mohammed first came to the attention of US investigators after the East Africa embassy attacks.

BBC: Profile: Fazul Abdullah Mohammed

The last two individuals are Fazul Abdullah Mohammed and Ahmed Khalfan Ghailani.

CNN: Transcript: Ashcroft, Mueller news conference

Fazul Abdullah Mohammed, reported to have been killed in the Somali capital Mogadishu, has long been one of the most wanted al-Qaeda suspects.

BBC: Profile: Fazul Abdullah Mohammed