LONDON (AP) — European Union diplomats are meeting to finalize the draft divorce agreement between Britain and the bloc, amid a warning from Spain that it will oppose the deal if it isn't guaranteed a say over the future of Gibraltar.

Spanish Prime Minister Pedro Sanchez tweeted that Britain and Spain "remain far away" on the issue and "if there are no changes, we will veto Brexit."

Spain wants the future of the tiny British territory at the tip of the Iberian Peninsula to be a bilateral issue between Madrid and London.

Spain doesn't have a veto on the withdrawal agreement, which does not have to be approved unanimously. But it could hold up a future free-trade deal between Britain and the EU, which would require approval of all 27 EU nations.