Republican Rep. Mike Gallagher will resign early, leaving House majority hanging by a thread  —  House Republicans lost another member in Rep. Ken Buck, R-Colo., on Friday.  Gallagher's early departure could leave Republicans with just one vote to spare on legislation.

ISIS claims responsibility for attack at Moscow-area concert venue that left at least 60 dead  —  ISIS has claimed responsibility for an attack at a popular concert venue complex near Moscow Friday after assailants stormed the venue with guns and incendiary devices, killing at least 60 people and injuring 145.

Gunmen Kill at Least 60 at Moscow Concert Hall, Russian Officials Say  —  U.S. officials said the Islamic State was responsible for the attack, one of the deadliest in Russia's capital region in more than a decade.  —  Here is the latest on the attack in Russia.

Terrorist attack at concert hall outside Moscow Latest updates … a few seconds ago  —  Putin recently dismissed U.S. warning of potential terrorist attacks in Moscow  —  On March 19, Vladimir Putin dismissed warnings from U.S. diplomats that there was an imminent risk of a terrorist attack at a crowded venue in Moscow.