"At 20:32 Moscow time (5:32 p.m. GMT), a message was received that the crew of the Iran-flagged Tina vessel, docked at the central cargo port in Astrakhan, Admiralteyskaya 53a Street, was not feeling well", the ministry said on its website.
Brigades of the Russian Emergency Ministry, Health Ministry, and Consumer Welfare Oversight Services have been dispatched at the scene in Astrakhan.