(NBC News) Russian authorities have told U.S. investigators they recorded a 2011 telephone conversation between Boston bombing suspect Tamerlan Tsarnaev and his mother in which the pair discussed jihad, according to a source briefed on the investigation.
The conversation, which the Russians have said was captured electronically via a wiretap, was not presented to U.S. authorities until after the April 15 bombing that killed three people and injured 264 near the finish line of the Boston Marathon, according to the source.
Tamerlan Tsarnaev also mentioned the possibility of a trip to Palestine during the conversation with mom Zubeidat Tsarnaeva, the source said.
The phone call does not indicate there was clear intelligence that the now-deceased 26-year-old was plotting an attack at the time, counterrorism experts said.
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-- Jay Gray, NBC News, reports