Riyadh Says 3 Border Attackers Were Saudi

Three assailants killed during an attack on Saudi border guards on the frontier with Iraq this week were Saudi citizens, the interior ministry said on Friday.

An investigation is still under way to determine the nationality of a fourth assailant, a suicide bomber, the ministry said in a statement carried by the official Saudi Press Agency.

Monday's rare attack in Suwayf in the northern Arar region killed three Saudi border guards, including a top commander.

Police later arrested seven suspects in Arar -- three Saudis and four Syrian citizens -- the interior ministry said, adding that explosive belts, hand grenades, automatic rifles and revolvers were seized.