United States

Investigators in the Boston Marathon bombing case found female DNA on one of the bombs, and collected material from the home of the widow of Tamarlan Tsarnaev, one of the bombers. Russian officials said Tamarlan was in contact with two North Caucasus militants, Mansur Makhmud Nidal, a jihadist recruiter from Dagestan, and William Plotnikov, a Canadian Islamist in Dagestan.

Iraq

Islamic state

Syria

Aqap

Al shabaab

Boko Haram

Isis