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BAGHDAD, Iraq - In one of their boldest and most brutal attacks yet, insurgents waylaid three minibuses carrying U.S.-trained Iraqi soldiers heading home on leave and massacred about 50 of them -- many of them shot in the head execution-style, officials said Sunday.
The killing of so many Iraqi soldiers -- unarmed and in civilian clothes -- in such an apparently well-executed operation reinforced American and Iraqi suspicions that the country's security services have been infiltrated by insurgents.
A claim of responsibility posted on an Islamist Web site attributed the attack to followers of Jordanian-born terror mastermind Abu Musab al-Zarqawi.
Interior Ministry spokesman Adnan Abdul-Rahman said the victims were believed to have been killed about sundown Saturday on a road about 95 miles east of Baghdad near the Iranian border.
All the victims were shot in the back of the head, Iraqi police said. The victims had their hands crossed behind their heads, said Lt. Ali Jawad Kadhim from the nearby Mandali police station.