According to officials, preliminary investigations suggested that one of the buses had a burst tyre and had hit an oncoming bus head-on.

Three days of mourning have been declared by President Macky Sall, and he has promised to take steps to increase road safety.

This was one of the most fatal accidents in recent years, despite the fact that traffic accidents are common in Senegal.

According to Cheikh Fall, an official with the emergency services, 87 people were injured in the collision near the central town of Kaffrine.

He added that the injured have been transported to a hospital and medical center for treatment.

Mr. Sall tweeted that he was “deeply saddened by the tragic road accident” after confirming the 40 deaths.

“I send my deepest sympathies to the families of the victims and wish the injured a speedy recovery.”

In the meantime, a bus accident in Kenya has resulted in the deaths of 21 people and the injuries of 49 others.

When the bus crashed, it had just crossed into Kenya from Uganda.

According to Rogers Taitika, a spokesman for the Ugandan regional police, the driver appeared to have lost control and veered off the road.

He was quoted as saying that the majority of those killed were Kenyans, but eight Ugandans were also killed.