By Guy Faulconbridge MOSCOW (Reuters) -The Kremlin on Wednesday said it supported Serbia’s attempts to protect ethnic Serbs in northern Kosovo but denied Pristina’s accusation that Russia was somehow stoking tensions in an attempt to sow chaos across the Balkans. Serbs in the ethnically divided city of Mitrovica in northern Kosovo erected new barricades on Tuesday, hours after Serbia said it had put its army on the highest combat alert following weeks of escalating tensions. Albanian-majority Kosovo declared independence from Serbia in 2008 with the backing of the West, following a 1998-1999 w…