Russia

The Islamic State has claimed responsibility for the attack, but Russian officials appear to discount the possibility, saying the initial investigation is not focusing on terrorism as a "main theory."

Prime Minister Dmitry Medvedev said the U.S. sanctions package "ends hopes for improving our relations with the new administration." President Trump signed the bill but called it "seriously flawed."

Congress overwhelmingly approved the legislation, but the White House has many qualms with it. Moscow has already responded to the sanctions, which also affect Iran and North Korea.

Authorities say the defendants attacked guards and managed to take their guns while being transported in an elevator. Two other alleged gang members are said to be injured and in custody.

Allegations of murder, blackmail and hundreds of millions of dollars worth of corruption. William Browder's story has it all — and he shared it Thursday with a Senate panel investigating Russia.

The Russian Foreign Ministry says the U.S. must downsize its diplomatic staff in Russia; it's also blocking the U.S. Embassy from using two properties.

The Senate voted overwhelmingly Thursday to impose new sanctions on Russia, North Korea and Iran — over threats from the White House to veto the measure.

At a news conference in Finland, the Russian president called the bipartisan bill "extremely cynical." But he said Russia will wait to see its final version before forming a "definitive view on it."