A strike by French airport security workers Saturday caused widespread travel disruptions during a busy holiday season at Lyon and Paris Charles de Gaulle airports.

Airport officials in Lyon said all 111 flights expected to fly out Saturday were cancelled.

The officials said they expect the strike to stretch into Sunday.

Passengers at Charles de Gaulle airport in Paris faced delays at security checks, but no flights were cancelled.

The French News Agency reported unions are demanding new negotiations on working conditions and salaries.