SANTIAGO JUXTLACUACA, Mexico — Two Mexican activists missing after an attack on an aid convoy, in which one Mexican and one Finn were killed, returned on Thursday and said two missing journalists were alive. The activists said one of the journalists had been shot in the foot so they could not leave a mountainous area where they had fled after Tuesday's attack in San Juan Copala, southern Mexico, where tensions are high between indigenous Trique groups and authorities. Police were unable to enter the volatile area on foot on Thursday due to gunfire, the father of the injured journalist, David...