LVIV, Ukraine (Reuters) -Russia accused Ukraine of carrying out an air strike against a fuel depot in the Russian city of Belgorod on Friday, an incident the Kremlin said could affect peace talks, but a top Kyiv security official denied responsibility. Russia’s defence ministry said that two Ukrainian helicopters struck the facility in Belgorod, some 35 km (22 miles) from the border with Ukraine, after entering Russia at extremely low altitude at around 5 a.m. Moscow time (0200 GMT). Ukraine’s top security official rebuffed the Russian accusation – the first by Moscow of an air strike on Russi…