3 people dead

He said France would not surrender its core values after visiting the Notre-Dame basilica in the southern city. An extra 4,000 troops are being deployed to protect churches and schools.

In Nice, one elderly victim was "virtually beheaded", officials said. Another woman and a man also died.

A male suspect was shot and detained.

Anti-terror prosecutors have opened an investigation into the attack and France has raised its national security alert to its highest level.

The busload was making the one-hour journey to Manono from Apia, on the island of Upolu, when it struck a vehicle coming the opposite way.

The collision left the bus effectively split in half, and many of the passengers were left in a critical condition.

A witness told The Samoan Observer that the bus driver had lost control of his vehicle before ploughing into the oncoming car.

Footage of the incident's aftermath shows the bus crashed on the roadside without a roof and sides, and its seats badly damaged.