The FBI has issued a nationwide bulletin seeking the arrest of an alleged associate of the suicide hijackers who carried out the September 11 terrorist attacks on the US.

A suspected Yemeni al-Qaida member, believed to be related to one of the September 11 hijackers, blew himself up after being cornered by security forces in a San’a suburb.

Yemeni investigators are trying to track suspected militants and tightening security following US warnings of a terrorist attack in the country.

The FBI has issued an extraordinary terrorist alert asking police forces and the public to be on the lookout for a Yemeni man and several associates who might be plotting an imminent terrorist attack as early as today.