Qatari Assistant Director for Security Brigadier Ahmad Al-Hayki refused on Sunday to accuse Al-Qaeda of organizing Saturday's blast in Doha, the Qatar News Agency reported Sunday.

Al-Hayki said that the security authorities would rather complete investigations before accusing anybody for planning the blast, especially that no specific party has claimed responsibility for it yet.

Foreign embassies in Doha have tightened security procedures and called on their citizens to be more cautious.

A bomb blast occurred close to Doha Players' Theatre of the Doha English Speaking School late night. A British man was killed in the attack and at least a dozen people were wounded.

Qatari Interior Ministry said earlier Sunday that the suicide car bomber who carried out the attack was identified as an Egyptian citizen named Omar Abdullah Ahmad Ali.

(Xinhua News Agency March 21, 2005)