Russian state gas giant OAO Gazprom said Monday it will only ship fuel to Ukraine if it pays in advance, making good on a threat that could lead to supply cuts affecting European customers after late-night EU-mediated talks on debt repayment failed to yield a deal . Gazprom said it hadn’t received payment for a debt it put at $4.458 billion by the Monday deadline it had set. “Ukraine will receive gas only in the amounts it has paid for,” Gazprom said. There was no immediate reaction from Kiev. The shift to prepayment is likely to lead to a reduction in supplies to Ukraine and could affect Russia’s shipments to Europe, the bulk of which go through Ukraine. Industry analysts say the initial effect on European markets of any supply disruption may be limited because of current […]