A boat, presumably a vessel of the Ukrainian State Border Service, exploded on Peschany Beach in Mariupol on Sunday, according to the city website 0629.
"A boat blew up right now in front of holiday-makers. It looked very much likely a coastguard vessel," a posting says.
The press service of the Donetsk Border Detachment confirmed to the 0629 website that, "the boat belonged to the border guards."
It also said that ambulance vehicles with flashing lights had rushed to the beach near to the town of Peschany. No information was provided about casualties.
The boat could not be seen from the beach as of 2:55 p.m.. "It could have sunk. Several rescue boats have approached the scene of the explosion, presumably to search for the victims," the press service said.
The Mariupol City Council's emergencies and diving service later told the website that the explosion went off aboard a patrol boat four kilometers from the coast. Two rescue boats, two tugboats of the Mariupol port and three vessels of the emergencies and diving service were dispatched to the scene to save the victims.
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