RIYADH, 23 April 2004 — Security has been stepped up across the capital after Wednesday’s bomb blast. Government offices, hotels, housing compounds, shopping malls, banks and embassies are all in a high state of alert. Most government offices and the commercial organizations imposed tighter restrictions on visitors, who were asked to produce ID. Major government installations and hotels were put under the special guard of the mobile police and truckloads of special forces with mounted machine guns.