MOSCOW—Armenian Prime Minister Nikol Pashinyan proposed on Thursday that Russian border outposts be stationed along the length of Armenia’s border with Azerbaijan after a rise in tensions between Yerevan and Baku. Armenia and Azerbaijan accused each other earlier on Thursday of flouting a Russian-backed ceasefire that both sides had accepted the previous day to halt deadly clashes over their joint border, which Yerevan wants demarcated. “Given the current situation, I think it makes sense to consider the question of stationing outposts of Russian border guards along the entire length of the Armenian-Azeri border,” Pashinyan said during a government meeting. He said Yerevan was preparing to discuss the proposal with Moscow and that the move would allow work to be carried out on the demarcation and delimitation of the border without the risk of military clashes. The Kremlin said it was in close contact with both Armenia and Azerbaijan, but declined …