Ukrainian authorities say say they have detained 27 alleged members of a "saboteur" group in the Black Sea port city of Odesa.
President Petro Poroshenko's press secretary, Svyatoslav Tseholko, said on Facebook on April 9 that Security Service (SBU) chief Valentyn Nalyvaychenko reported the suspects' detention to Poroshenko.
According to Tseholko, investigators found grenade launchers and maps of Odesa's ports in the suspects' possession. He said two of those detained are also suspected of plotting to kill a lawmaker.
Last week, the SBU said it detained three people suspected of involvement in a series of bombings in Odesa, some of them targeting organizations with ties to soldiers fighting against Russian-backed rebels in eastern Ukraine.
Ukrainian authorities blamed those blasts on Russia and the rebels who hold parts of the eastern provinces of Donetsk and Luhansk.
Odesa lies on territory coveted by the separatists.