BBC News reports: A UN diplomat says the UK, France and Colombia have told Security Council members they would abstain in any vote on Palestinian membership.
None of these countries have officially confirmed this yet.
But their decision is a setback for the Palestinians, who have been trying to win support from European states.
A Council committee is considering a Palestinian application to become a UN member state and is expected to present its report next week.
The UN diplomat said Britain, France and Colombia stated their positions in a private meeting of the Security Council committee dealing with the Palestinian application.
The diplomat said Germany also declared it could not support the Palestinian bid, without clarifying whether it would abstain or vote against.