BRUSSELS

Railway employees across Italy launched a nationwide 21-hour strike that caused major disruptions for travelers as workers are demanding improved safety at construction sites and the renewal of the collective labor agreement.

The ANSA news agency said the strike, which began at 9 pm local time Monday and is scheduled to end at 6 pm Tuesday, led to widespread train cancellations and delays of up to two hours. The walkout involves employees under the state rail group, Ferrovie dello Stato.

There are 30 trains that were canceled at Rome's main Termini station by midday Tuesday. In Venice, nearly all departures and arrivals at the Santa Lucia station were suspended. Naples Central Station also reported long queues at information points, with about half of the scheduled trains canceled.

The strike has affected not only high-speed and intercity trains but also regional services. Essential regional trains were guaranteed to operate during peak morning hours, from 6 am to 9 am, to reduce the effect on commuters.