The hunt for the origins of COVID-19 has gone dark in China, the victim of political infighting after a series of stalled and thwarted attempts to find the source of the virus that killed millions and paralyzed the world for months.

The Chinese government froze meaningful domestic and international efforts to trace the virus from the first weeks of the outbreak, despite statements supporting open scientific inquiry, an Associated Press investigation found. That pattern continues to this day, with labs closed, collaborations shattered, foreign scientists forced out and Chinese researchers barred from leaving the country.

Four Germans were caught laying white roses in memory of Adolf Hitler at the house where the Nazi dictator was born in western Austria on the anniversary of his birth, and one gave a Hitler salute as they posed for photos, police said Monday.

Hitler was born on April 20, 1889, in Braunau am Inn. After lengthy wrangling over the future of the house where he was born, work started last year on turning it into a police station — a project meant to make it unattractive as a pilgrimage site for people who glorify Hitler.

Europe is the fastest-warming continent and its temperatures are rising at roughly twice the global average, two top climate monitoring organizations reported Monday, warning of the consequences for human health, glacier melt and economic activity.

The U.N.'s World Meteorological Organization and the European Union's climate agency, Copernicus, said in a joint report that the continent has the opportunity to develop targeted strategies to speed up the transition to renewable resources like wind, solar and hydroelectric power in response to the effects of climate change.

Iranian and Pakistani leaders vowed to strengthen economic and security cooperation in a meeting on Monday, as the two countries seek to smooth over a diplomatic rift.

Their meeting was part of efforts by Islamabad and Tehran to mend ties which had been briefly strained in January when each carried out strikes in other's territory, targeting militants accused of attacking their own security forces.

Liverpool stayed in the hunt for the Premier League title and moved level on points with leader Arsenal with a 3-1 victory over Fulham that was illuminated by a brilliant free kick by Trent Alexander-Arnold on Sunday.

Liverpool bounced back from Thursday's exit to Atalanta in the Europa League quarterfinals and last weekend's home loss to Crystal Palace by winning at Craven Cottage after Jurgen Klopp dropped Mohamed Salah and Alexis Mac Allister to the bench.

Manchester United set up another FA Cup final against fierce rival Manchester City in a way no one could ever have imagined.

In a semifinal match on Sunday that will live long in the memory, United blew a three-goal lead against second-tier Coventry, was saved by the narrowest of offside calls by the VAR in stoppage time of extra time to keep the score at 3-3, then came from behind in a penalty shootout to advance to the May 25 title match back at Wembley Stadium.

With a late strike by Jude Bellingham, Real Madrid took a huge step toward winning the Spanish league.

Bellingham, who quickly became one of Madrid's most important players after his transfer last year, likely sealed the title on Sunday by scoring a stoppage-time winner in a 3-2 victory over Barcelona in the final "clasico" of the season.

Ukrainian commander Oleksiy Tarasenko witnessed a frightening shift last month in Russia's efforts to punch through Kyiv's defense of the industrial region known as the Donbas.

Standing against Russia's unyielding advance in the strategic front-line town of Chasiv Yar, he noticed that, instead of making typical light infantry assaults, Moscow's forces were taking brazen risks by launching battalion- and platoon-sized attacks, sometimes with up to 10 combat vehicles.

For the first time in history, prosecutors will present a criminal case against a former American president to a jury Monday as they accuse Donald Trump of a hush money scheme aimed at preventing damaging stories about his personal life from becoming public.

A 12-person jury in Manhattan is set to hear opening statements from prosecutors and defense lawyers in the first of four criminal cases against the presumptive Republican presidential nominee to reach trial.

Turkish President Recep Tayyip Erdogan arrived in Iraq on Monday for his first official visit in more than a decade as his country seeks greater cooperation from Baghdad in its fight against a Kurdish militant group that has a foothold in northern Iraq.

Other issues also loom large between the two countries, including water supply issues and exports of oil and gas from northern Iraq to Turkey, which have been halted for more than a year.