Moscow on Thursday (Mar 2) claimed that Ukrainians had crossed into southern Russia and killed two civilians, an allegation dismissed by Kyiv as a "deliberate provocation". Russia says its regions bordering Ukraine are routinely shelled by Ukrainian forces, but the alleged incursion, if confirmed, would be a rare instance of fighting inside its territory. Russia's FSB security service said in a statement that the "Ukrainian nationalists" had later been pushed back over the border and targeted with a "massive artillery strike".