Another series of train stoppages due to false alarms

The Polish state railway system operator PKP PLK spokesperson Karol Jakubowski said on Tuesday that, by 1 p.m., unauthorized uses of the "radio-stop" signal were reporter in four voivodeships. "There was no danger to the passengers. Due to the unauthorized uses of the radio-stop signal a total of 25 trains were stopped, to an average delay of 7 minutes," the spokesman said.

"All cases have been reported to proper authorities responsible for examining them in detail," he added.

"At the moment the railway network is unobstructed. The railway lines are under constant monitoring," Jakubowski said, adding that a special team composed of carriers and infrastructure experts was ready to act in case of emergency.

The PKP PLK also said the radio-stop system was not part of rail traffic control and radio communication devices were not able to affect the operation of traffic control devices, so unauthorized use of the system did not affect railway safety. Earlier that day, Poland's National Public Prosecutor's Office said that the two man arrested in relation to an unauthorized use of the radio-stop signal have been charged. The police confirmed late on Monday that one of the suspects is a police officer.

The two suspects could be facing up to 8 years in prison.

"The Internal Security Agency is conducting explanatory proceedings in connection with a series of incidents destabilizing part of railway traffic in Poland," said Stanisław Żaryn, deputy coordinator of special services. On Saturday, he said the Internal Security Agency (ABW) and police were probing unauthorized use of the system involved in rail traffic management in northwestern Poland. Separately, the state railway operator is investigating the derailment of two trains and collision of another two on Thursday.