The EU failed to finalize its 21st sanctions package against Russia on Monday, leaving the bloc's floating oil price cap vulnerable, several media outlets reported.
Without an agreement by Wednesday's deadline, the cap risks jumping well above current levels, potentially undermining efforts to curb Kremlin oil revenues, the reports noted.
The reports further added that a critical point of concern for energy markets is the EU's floating oil price cap, a cornerstone of its sanctions architecture designed to remain 15% below the average market rate for Russian Urals crude.
If ambassadors cannot reach a consensus before the deadline, the cap is expected to climb significantly above its current $44.10 level, driven by a global price surge following recent escalation between US and Iran, according to the reports.
Ambassadors are expected to reconvene on Tuesday to make a final attempt at a breakthrough before the price cap adjustment takes effect, it added.
The EU did not immediately respond to' requests for comments.