Jim Heintz, Associated Press

Many Ukrainians were plunged into darkness across several cities on Friday. At least five people were killed.

The Federal Penitentiary Service said in a statement that Navalny, 47, felt unwell after a walk and lost consciousness.

Vladimir Putin has moved to prolong his repressive and unyielding grip on Russia for at least another six years, announcing his candidacy in the presidential election next March that he is all but certain to win.

A cloud of questions hangs over Russia’s claim that two Ukrainian drones flew into the very heart of Moscow under the cover of darkness.

Thousands of supporters of imprisoned Russian opposition leader Alexei Navalny crowded into central Moscow on Wednesday as part of nationwide demonstrations calling for his freedom as his health reportedly is in severe decline while on a hunger strike.

Laboring through subfreezing cold, Russian rescue workers were digging into a sprawling heap of jagged rubble when one heard the faintest sound.

An Iraqi woman who became a global advocate for victims after being raped and tortured by Islamic State militants and a Congolese surgeon who has treated countless rape victims in his war-torn nation won the Nobel Peace Prize on Friday for fighting to end the use of sexual violence as a weapon of war.

Sweden’s Royal Academy of Sciences said Arthur Ashkin’s development of “optical tweezers” that can grab tiny particles such as viruses without damaging them realized “an old dream of science fiction — using the radiation pressure of light to move physical objects.”

Researchers from the United States and Japan won the Nobel Prize in medicine on Monday for discoveries that help the body marshal its cellular troops to attack invading cancers.

An airliner carrying 61 people from Dubai crashed early Saturday while landing in the southern Russian city of Rostov-on-Don in strong winds, killing all 55 passengers and six crew members aboard.