An explosion hit a tanker train in the Severonomuisky tunnel in Buryatia, Russia, early Thursday, igniting a fire that burned for hours.
A second explosion hours later struck another fuel-carrying train crossing a high bridge in Siberia.
Russian Railways, the state-operated rail company, diverted traffic due to the attacks but assured that it did not significantly disrupt transportation.
Investigators suspected an explosive device planted under a train carriage caused the tunnel explosion, but there was no confirmation on the cause from authorities.
‘Forgotten’ since Gaza war, Ukraine says no ceasefire unless Russia withdraws
‘Forgotten’ since Gaza war, Ukraine says no ceasefire unless Russia withdraws
While Russian authorities did not comment on the second explosion, Ukrainian sources suspected the attack was targeting the diverted rail traffic on the backup route at Chertov Bridge.