At least 20 people including children have been killed after an armed gang attacked a small town in Haiti.

Another 50 were wounded as Gran Grif gang members rampaged through Pont-Sondé in the central Artibonite region about 71km (44 miles) north-west of the capital Port-au-Prince.

Video footage shows groups of people fleeing the violence on motorbikes and on foot. A government prosecutor described the attack as "a massacre", reported the Associated Press.

Armed gangs have taken control of large parts of Haiti and a UN-backed policing mission, led by officers from Kenya, began in June in an attempt to wrestle back control.

The exact number of dead from the attack is not clear - local media reported that more than 50 had been killed, while a Haitian human rights group put the figure at 20 or more, AP said.

Gran Grif is said to be one of the most violent of Haiti's gangs. In January 2023 its members were accused of attacking a police station near Port-Sondé and killing six officers. It is also blamed for forcing the closure of a hospital serving more than 700,000 people.

The gang has about 100 members and has been accused of crimes including murder, rape, robberies and kidnappings, according to a UN report cited by AP. Both its founder and current leader are subject to US sanctions.

Thursday's gang rampage comes almost a month after the Haitian authorities expanded a state of emergency to cover the whole of the country.

Prime Minister Garry Conille has vowed to crack down on the gangs, with the UN saying a "robust use of force" is needed.

It has approved the policing mission made up of 2,500 officers from various countries - including 1,000 pledged by Kenya.

Their deployment has been authorised for one year, with a review to be held after nine months.