Confirming the development, Rivers State Police Public Relations Officer, DSP Angela Agabe, gave the victims names as Vadym Shytov, from Ukraine; Obaya Marak, from Kiribati; Mikhail Teresgji, from Russia and Oleksiv Ishmyetvev, from Ukraine.
She said the men were abducted off the coast of Bayelsa waters on April 22, adding that they were sighted around Borikiri area two days ago.
According to her, the anti-kidnap squad of the police quickly mobilised to rescue them.
The police spokesman, who said the rescued hostages had been handed over to their firm, added that investigation was on to track down those behind the abduction.
“The state commissioner of police, Mr Mbu Joseph Mbu, received the hostages and handed them over to Mr Larry Etete, a company staff. Investigation in progress,” Agabe said.