OUAGADOUGOU, Burkina Faso — At least 18 people were killed in Burkina Faso when suspected Islamic militants stormed a popular cafe and sprayed diners with bullets, authorities said Monday.

At least 22 people were wounded in the attack Sunday at the Aziz Istanbul restaurant, which is popular with foreigners.

Authorities said many of the victims were children dining with their families when horror struck once again in Burkina Faso’s capital of Ouagadougou. Less than two years ago, jihadists killed 30 people in a similar attack at the nearby Cappuccino cafe, which has only recently reopened.

Eight of the dead in Sunday’s attack were citizens of Burkina Faso, authorities said.

Three Lebanese and two Canadians were also killed, according to the victims’ respective foreign ministries. Other victims came from Kuwait, Senegal, Nigeria, Turkey, and France, state prosecutor Maizan Sereme said.

The attack began around 9 p.m. Sunday when the upscale Turkish restaurant was packed with diners. Two young men wearing jeans and jackets drove up on motorcycles and began indiscriminately shooting at the people inside with Kalashnikovs, witnesses said.

‘‘I heard a noise when they smashed a car with their motorbike and before I understood what happened they started shooting at the customers on the terrace,’’ said Assane Guebre, who had been keeping an eye on customers’ cars parked outside.

‘‘They were close to me, and I still don’t know how they did not hit me first,’’ said Guebre, whose hands were still bleeding from the cuts he suffered when he threw himself to the ground to avoid the bullets.

Gunfire rang out long into the night before the country’s special forces ended the attack after nearly seven hours. Initially authorities had said there were three or four assailants. However, government spokesman Remy Danguinou told reporters early Monday that two attackers had been killed by the authorities.

There was no immediate claim of responsibility but the attack bore the hallmarks of the January 2016 assault on the Cappuccino: gunmen opening fire on diners at a restaurant popular with foreigners, prompting a massive search for the culprits as gunfire and explosions continued into the night.

President Roch Marc Christian Kabore declared three days of national mourning. ‘‘The fight against terrorism is a long-term battle,’’ he said in a statement Monday.