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The Boston Globe

Nation

Mass. antiterror units were unaware of FBI probe of Tamerlan Tsarnaev

WASHINGTON — Antiterrorism intelligence units in Massachusetts were never notified that FBI agents had examined the activities of Tamerlan Tsarnaev in 2011, further evidence of gaps in the network of post-9/11 measures that may have contributed to insufficient scrutiny of the suspected Marathon bomber.

The Boston Regional Intelligence Center and the Commonwealth Fusion Center in Maynard, which are supposed to serve as clearinghouses for information about potential threats, were unaware that the FBI interviewed Tsarnaev as part of a three-month investigation after Russian agents alerted US officials to his increasing radicalization, officials said.

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