London: Al-Qaida leader Osama bin Laden had personally issued directives for terrorist attacks in Riyadh, a British newspaper reported on May 15.

Saudi security officials have claimed that Mohammed al-Johani was the mastermind behind the attacks who had arrived in Saudi Arabia on forged travel documents two months back and remained untraced since then. He is a Saudi national and left his country when he was only 18.

Meanwhile, FBI has warned of a possible big al-Qaida attack in Britain.

In a letter FBI told authorities that the next target of the terrorist network is Britain. Terrorists have planned to hijack and transform an oil tanker in Britain into a mobile bomb, the letter said.

Scotland Yard has strengthened security measures after the FBI warning.

ANI