BUENOS AIRES, Argentina - Argentines holding vigil in their capital’s central Plaza de Mayo before Tuesday’s papal installation ceremony erupted in joy when Pope Francis called at 3:30 a.m. local time urging them to cast aside their conflicts and take care of each other.

‘‘My dear children, I know you’re in the plaza,’’ he said during the call, which he made just an hour before his ceremony began in St. Peter’s Square. His words were routed to loudspeakers and transmitted live by television and radio across Argentina.