Police in Mozambique said 10 people were beheaded in an attack over the weekend in an area where previous Islamist attacks have been reported.
Radio Mozambique said police in the capital Maputo could not immediately give details of the attack in a village near the town of Palma, close to Mozambique’s border with Tanzania.
The area was also near one of the world’s biggest untapped offshore gas fields.
“Unknown persons killed by decapitation at least 10 people in recent days in the administrative post of Olumbi, Palma district, in the north of Cabo Delgado province,” Radio Mocambique said in a brief report.
The radio station did not provide any further details on the attack.
Portuguese news agency Lusa, quoting national broadcaster TVM, said two children were among those beheaded but this could not be independently verified.
Palma district administrator David Machimbuko told the station that authorities had moved security teams to areas where further attacks were feared.
Police spokesman Inacio Dina said officers were gathering information from a team dispatched to the north.
Local media have reported a series of attacks carried out by Islamists since October 2017, when police stations were attacked in the north, a predominantly Muslim region.
Mozambique has not been a focal point of Islamist militant activity in the past and police have been reluctant to ascribe the attacks to Islamists.
Muslims make up about 18 per cent of Mozambique’s population.
Roman Catholics form the largest single religious grouping, with about 30 per cent of its 30 million people.