The Islamic State declared that it had seized two military bases near the port town of Mocímboa da Praia, in the northern province of Cabo Delgado, after a series of coordinated attacks Aug. 5-11.
Asked by Aid to the Church in Need about the whereabouts of 60 other people who went missing, Lisboa said: "Some of them were able to flee and leave Mocímboa da Praia. Others are still there."
He called for prayers for those who were still missing.
The Diocese of Pemba is located in a region that has experienced escalating extremist violence, with multiple churches burnt, people beheaded, young girls kidnapped, and more than 200,000 people displaced by violence.
More than 1,000 people have been killed in attacks in northern Mozambique since 2017, according to the Center for Strategic and International Studies. Some of these attacks have been claimed by the Islamic State, while others have been carried out by the homegrown Ahlu Sunna Wal extremist militant group, which has been kidnapping men and women.
Lisboa told Pope Francis in a phone call Aug. 21 of his concern that he had not heard from the two religious sisters following the attack. He said that the pope was saddened by the news and promised to pray for them.