Armenian police detained 88 people at a protest in the capital Yerevan by demonstrators demanding the resignation of Prime Minister Nikol Pashinyan over his decision to cede several border villages to Azerbaijan.
Armenia said last month it would return the uninhabited villages in what both sides said was an important milestone as they edge towards a peace deal after fighting two wars since the collapse of the Soviet Union.
The decision has angered many in Armenia. Protesters led by a senior Armenian cleric reached Yerevan on Thursday after walking for several days from a village in the country's northeast, a distance of some 100 miles (160 km).
Archbishop Bagrat Galstanyan called for Prime Minister Pashinyan's resignation at rally of thousands of supporters, who he encouraged to begin acts of civil disobedience aimed at toppling the government.
Opposition parties in Armenia's parliament have said they will try to begin impeachment proceedings against Pashinyan, whose Civil Contract party retains a majority of lawmakers, and is unlikely to break with him.
Armenia is a treaty ally of Russia and traditionally Moscow's closest partner in the South Caucasus, but bilateral relations have sharply deteriorated in recent months as Yerevan has sought to build ties with the West, blaming Russia for failing to defend it from Azerbaijan.
The US military said on Monday it destroyed six Iranian small boats and intercepted Iranian cruise missiles and drones as Tehran sought to thwart a new US naval effort to open shipping through the Strait of Hormuz.
President Vladimir Putin has declared on Monday a two-day ceasefire in the conflict with Ukraine on May 8-9 to mark Russia’s World War Two victory, but Ukrainian President Volodymyr Zelenskyy countered with his own proposed pause in fighting starting earlier, on the night of May 5‑6.
A blast at a fireworks factory in China's Hunan province has killed 21 people and injured 61, prompting President Xi Jinping to call for a thorough investigation, state media reported on Tuesday.
A small airplane with five occupants crashed into a building on Monday in the city of Belo Horizonte in southeastern Brazil, killing three people, local officials and firefighters said.
A midmorning Russian missile attack on the town of Merefa, in Ukraine's northeastern Kharkiv region, killed seven people and wounded more than 30, including a 2-year-old boy, Ukrainian officials said on Monday.