Gas pressure gauges are seen at Rembelszczyznia PGNiG gas centre outside Warsaw January 3, 2006. Central European EU states called on Tuesday for diversification of gas supplies away from Russia after Moscow's decision to halt deliveries to Ukraine reignited concerns over the reliability of their dominant supplier. Officials from the region's largest countries Poland, Hungary, the Czech Republic, Slovakia and Austria, the current EU president, are due to discuss energy security on Tuesday, with diversification seen high on the agenda. REUTERS/Katarina Stoltz