After tumbling more than 1% on Friday trade, UK FTSE 100 extended losses on Monday, falling 0.9% amid EU summit and enduring Greek debt talks. UK benchmark was weighted down by mining and oil shares. Miners Evraz PLC plunged 4.7%, while Antofagasta PLC and Vedanta Resources PLC each fell 3%. Oil manufacturer Petrofac Ltd edged down 0.4% and BG Group PLC slipped 1.9%. At the moment of writing FTSE 100 is 1.04% or 59.59 points down at 5,673.78.