Four Ukrainian border guards were killed in a Russian helicopter attack, the Ukraine military says. On Monday, Ukraine grabbed 10 Russian paratroopers who they say were on a “special mission” in the country. A video of the men released by the Ukrainian military claims they were fighting with pro-Russia rebels after crossing into Donetsk in a column of military vehicles. Both Russia and the soldiers claim not to have known they had entered Ukraine. “Everything is different here, not like they show it on television. We’ve come as cannon fodder,” one says in the video. On Tuesday, Ukrainian President Petro Poroshenko and Russian leader Vladimir Putin are set to meet for talks.