Two suspected terrorists blew themselves up in Mecca, Saudi Arabia, hours after a third suspect was killed in a shootout with security forces in Riyadh on Thursday.

The two, who killed themselves when police closed in on them, were part of a terror cell linked to the Al Qaeda.

Eight policemen were injured in the Riyadh shootout, which took place in a narrow street. Several terrorists were arrested later.

There has been a nationwide security crackdown ever since the May 12 suicide bombing in Riyadh, which killed 35 people.