A large number of militants arrested by Saudi security forces were on drugs, Saudi Interior Minister Prince Nayef says. The Saudi official said the ministry has seized tons of drugs and millions of tranquilizer pills in operations in which more than 400 members of the kingdom's narcotics squads have been killed, AP reported. “Many of those who have been arrested in terror-related (incidents) were drug users,'' said Nayef. Hundreds of suspected militants have been arrested since Saudi Arabi launched a crackdown on “terrorist cells” following attacks on residential compounds in Riyadh in May 2003.