Egyptian president Abdel-Fattah El-Sisi expressed his country's solidarity with France a day after a major attack that killed at least 84 people in the French resort city of Nice, saying Cairo is ready to cooperate with the international community to defeat terrorism.

El-Sisi condemned Thursday's killings on France's national holiday as a "brutal, terrorist" act, and extended condolences to his French counterpart Francois Hollande and the French people.

A gunman ploughed a heavy truck into crowds celebrating France's Bastille Day in the Mediterranean city, resulting in the deaths of at least 84 revelers and wounding scores more.

El-Sisi stressed that, "Egypt's full solidarity with France and its backing to international efforts are being made to eliminate terrorism," a statement from his office reads.

The president also urged concerted international efforts to organise a "comprehensive strategy to defeat terrorism."