RIYADH, Saudi Arabia - Saudi police hunted for suspects today after insurgents bombed two security headquarters in Riyadh, setting off violence that left 10 attackers and one bystander dead. It's what appears to be the latest blow by al-Qaida-linked militants against the Saudi royal family.

Saudi TV reported that police sealed off streets near the sight of the explosions and sent helicopters to search for the suspects in Wednesday's apparently coordinated strikes on the kingdom's security apparatus.

An Interior Ministry statement blamed a "deviant group" - the government's term for al-Qaida - for the attacks, which began at about 8:35 p.m. in central Riyadh near the Interior Ministry, which is in charge of Saudi security forces.

A police official said two militants detonated a car bomb by remote control in a traffic tunnel near the ministry. But Al Riyadh, a state-controlled newspaper, said the attack was a suicide bombing, quoting a spokesman for the Interior Ministry, Brig. Gen. Mansour al-Turki.

Saudi TV said a bystander, a limousine driver, was killed. The ministry reported no deaths but said five security agents and a few bystanders were injured, none seriously.

A half-hour after the first blast and five miles away, a second explosion went off at a center for recruiting security troops. Police said two suicide bombers tried to storm the center but blew up their car prematurely after police fired on them.

The Interior Ministry said 12 security officers and an unspecified number of bystanders were slightly injured.

Three attackers were killed at the sites of the blasts, according to media reports, and the ministry said seven others were killed after a chase to the north of the capital.

Al Riyadh said more than 90 people were injured in the attacks, mostly security forces and bystanders.

"This is a heinous and disturbing crime," Prince Ahmed bin Abdel Aziz, the deputy interior minister, told Saudi TV. He said the attackers were all Saudis and described them as "terrorists (who) took a great risk because they know that their end is imminent."

Oil prices rose more than 4 percent Wednesday in New York, with analysts citing fears of instability in Saudi Arabia, which has the world's largest oil reserves.