NEW BEDFORD (CBS) - The FBI has been searching a New Bedford landfill for evidence connected to the Boston Marathon bombings.
The landfill is near Dzhokhar Tsarnaev's UMass Dartmouth dorm room, where he was spotted after the bombings.
Specifically Authorities are trying to find any sales receipts or discarded packaging from ammunition purchases or parts of homemade bombs that may have been used in test explosions.
The brothers allegedly built three pressure cooker bombs and several homemade grenades.
Three people in New Bedford were detained by the FBI for questioning in connection with Tsarnaev last Friday.
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