Word of a cease-fire agreement between Hutu militiamen and Tutsi rebels seemed finally to reach Rwanda's warring gunners, who had kept up mortar fire despite Tuesday's announcement at the pan-African summit in Tunisia. "Something seems to be happening," the deputy commander of the U.N. peacekeeping force, Brigadier General Henry Anyidoho, told reporters. But U.N. officials say reports of a new atrocity -- the alleged government massacre of 60 Tutsi boys abducted from a church -- will threaten the peace. France is suggesting it may intervene militarily.