I went back and looked, (honestly didn’t look the first time), and could find nothing about that, but it could be my poor searching skills.
Anyway, I posted it because it was all I could find initially. Here is the only other article I have found that references their mosque specifically.
http://www.usatoday.com/story/news/nation/2013/04/19/muslim-boston-bombing-suspects/2096659/
BREAKING: With his brother shot by police, Dzhokhor A. Tsarnaev drove over him, 2 law enforcement officials said. - @BostonDotCom
“Brittain wrote an article last month, posted on MichaelMoore.com, criticizing the American and British government’s “war against Islam” and Washington’s “global gulag” of black sites.”