The News International reported that Islamic Jehad Union (IJU) has come under FBI's focus for its alleged links with Tamerlan and Dzhokhar Tsarnaev, two brothers of Chechen descent who allegedly carried out the blasts in Boston April 15, killing three people.

FBI believes that the two brothers were linked to the Islamic Jehad Union which has recruited Chechens, Uzbeks, Europeans and Arab Muslims to fight with them against the US forces in Afghanistan, it cited the American media as saying.