Russian state news agency TASS reported that five long-distance trains were delayed Monday due to damage to a railway bridge across the Volga River in the city of Samara.
The blast occurred at about 1 am GMT, damaging the fence and bridge supports near the river bank.
This resulted in the partial suspension of suburban train service in the area.
The TASS report also quoted a local railway operator as saying that the damage to the bridge was caused by “unauthorized persons interfering” in the operation of the Zvezda-Chapayevsk railway.
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