Ministry is accused plotted attacks on police , and against oil companies . The Islamic fundamentalist movement supports the overthrow of the Saudi monarchy and carried out the September 11 , 2001 , terrorist attacks in the United States , the kingdom 's leading ally . Arrests linked to 2009 attack on police unit by Saudis dressed as women . Two suicide cells belong to Al Qaeda , the Ministry says . Al Qaeda launched wave of attacks in Saudi Arabia in 2003 .
Ministry is accused plotted attacks on police , and against oil companies . Arrests linked to 2009 attack on police unit by Saudis dressed as women . Two suicide cells belong to Al Qaeda , the Ministry says . Al Qaeda launched wave of attacks in Saudi Arabia in 2003 .