Jose Tembe BBC News, Maputo
Many people are fleeing the port town of Mocímboa da Praia in northern Mozambique following intense fighting between the army and Islamist militants.
Some are leaving in boats, while others are hiding in the bush.
Helicopters and heavy weapons have been used, causing significant casualties on both sides.
Government troops are trying to dislodge the jihadists, known as al-Shabab, from the town which they have seized for the second time this year.
The Islamic State group claimed the first attack.
At least 700 people have been killed and tens of thousands displaced by the insurgency which began in the gas-rich province of Cabo Delgado two-and-a-half years ago.