The NBC news article that Daily Mail links to has been scrubbed and now doesn’t include the portion about the FBI being notified last year about the older brother. However I was able to track it down to another NBC News article to corroborate it:
A police official source in Makhachkala, Dagestan, told NBC News on Sunday that the Russian internal security service reached out to the FBI last November with some questions about Tamerlan, and handed over a copy of case file on him.
Tsarnaev had first popped up on the local police radar in Dagestan last summer, the source said. During routine surveillance of an individual known to be involved in the militant Islamic underground movement, the police witnessed Tamerlan meet the latter at a Salafi mosque in Makhachkala, the police official said.
It was one of six times in total that surveillance officials witnessed Tsarnaev meeting this militant at the same mosque, according to the police official.
The militant contact later disappeared, the police official said, but so did Tsarnaev before investigators had a chance to speak with him. The FBI never responded, according to the Dagestani police official.
Here’s the Daily Mail article:
DAILY MAIL – Speculation is growing that one of the Boston bombers met a known Jihadist terrorist in 2011 – as it emerged the FBI failed to follow up on a Russian tip that he was seen with an Islamic militant six times.
On a YouTube account widely believed to belong to Tamerlan Tsarnaev, 26, there are two videos on a playlist called ‘terrorists’ created five months ago that since have been deleted.
Both videos appear under the name, ‘Amir Abu Dujana rabbanikaly’ which is also the name used by Gadzhimurad Dolgatov, a notorious Dagestani terrorist.
Investigators are pouring over the YouTube account to see if they can confirm whether Tsarnaev had any links with Dolgatov, who was killed by Russian security forces in Makhachkala in December 2012, after a fierce gun battle.
These latest revelations question the adequacy of the U.S intelligence community, who failed to spot the national security threat posed by suspect Tamerlan Tsarnaev and his younger brother Dzhokhar, despite the repeated warnings.
On Sunday, a Dagistani police official source revealed to NBC News that the Russian internal security service contacted the FBI in November with some questions about Tamerlan and handed over a copy of a case file on him.
The 26-year-old Chechen, who was living in the U.S. after being granted refugee status in 2002, first caught the eye of authorities after he was spotted meeting with a person involved in the militant Islamic underground movement in Dagestan. They met at a mosque on six occasions, the source said.
The source told NBC the militant and Tsarnaev disappeared before authorities could speak with them; they added that the FBI never responded. A senior law enforcement official said that the FBI’s earlier investigation did not turn up anything and they did not have the legal authority to keep tabs on him.
The question law enforcement officials will be asking themselves, is did Tamerlan meet Dolgatov when he visited Makhachkala in 2011.