Mateusz Morawiecki on Friday signed a directive to maintain the status of the alert which was raised in late February, the Interior Ministry said.
The new measure is effective until May 15.
The decision had come in response to an escalating security crisis and had seen the threat level go from one to three on a scale of four, the state PAP news agency reported at the time.
Meanwhile, IT experts have warned of fake news massively posted on social media such as Facebook or Twitter.
Poland’s Research and Academic Computer Network NASK (Naukowa i Akademicka Sieć Komputerowa) on Saturday said it had recently issued a Code of Good Practice for reference to prevent the spread of disinformation.
NASK experts warn to stay wary of information on social media as it may be manipulated or completely false.
Protection of critical infrastructure
Poland’s first alert level is referred to as ALFA-CRP, the second is called BRAVO-CRP, the third is known as CHARLIE-CRP, and the fourth is defined as DELTA-CRP.
The government introduced the lowest ALFA level in mid-February, later upgrading it to level three, CHARLIE, following cyber-attacks in Ukraine.
Government’s commissioner for cybersecurity, Janusz Cieszyński told the media in February that "the protection of critical infrastructure will be stepped up" under the new alert level.
“Those responsible for system security will be obliged to boost security procedures, for instance by putting administrators on round-the-clock duty,” Cieszyński said.
“Also, it will be necessary to review the available back-up resources in terms of their potential use,” he added.
Under Poland’s anti-terror laws, the third CHARLIE alert level "applies in case of events which suggest a probable subject of a terrorist attack targeting public security, the security of Poland, or the security of another country, creating a potential threat to Poland,” PAP reported.
CHARLIE can also be introduced when there is "credible and confirmed information about a planned event of a terrorist nature," according to the news agency.
(mo)
Source: IAR, PAP