Armenia on Monday briefly detained scores of demonstrators trying to block streets in the capital Yerevan as part of protests against government plans to concede land to the country’s historic foe, Azerbaijan. The ex-Soviet Caucasus country has agreed to hand over territory it has controlled since the 1990s and has started border delimitation efforts, in a bid to secure an elusive peace deal with Baku and avoid another bloody conflict. The territorial concessions have sparked weeks of protests by demonstrators, who have blocked major roads in an attempt to force Prime Minister Nikol Pashinyan …