Did Russian authorities warn the FBI about one of the two brothers accused of last years Boston Marathon bombing?

An NBC News report Tuesday said yes, the U.S. missed a chance to detain Tamerlan Tsarnaev, one of two Chechen brothers accused of the bombings.  Tamerlan died in a gunfight with police.  His brother Dzhokhar was wounded and is currently awaiting trial in November.

The network, according to the Huffington Post, said that a memo was sent to Customs and Border Protection database that would trigger an alert if Tsarnaev would leave or re-enter the U.S.

An investigation, which prompted the memo, was opened in March 2011.  It was closed in June 2011 after finding that he had no links to terrorism, according to the NBC report.   was clo

In September 2011, a second memo was entered into the database, but it spelled the name as Tsarnayev instead of Tsarnaev.

The September note, according to the Huffington Post, directed Tsarnaeve's detention was mandatory if he left or re-entered the country.

Tsnaraev flew to Russia in January 2012, but he wasn't not considered high priorty on a "hot list" of travelers through JFK airport that day.

He returned July 2012, but was not detained or questioned because of the name misspelling, according to the NBC News report.

Read more at HuffingtonPost.com.