Brussels  - A number of mid-sized European Union members will complain to the bloc's presidency about their exclusion from world talks on the financial crisis when other similar-sized states have been invited, top officials in Brussels said Sunday.

"We have - we are going to approach the presidency about this matter with other countries," Finnish Prime Minister Matti Vanhanen told journalists at the opening of an EU summit.

However, the move will be made by EU foreign ministers in the coming days, not at Sunday's emergency EU summit in Brussels, he said.

Poland, the largest of the countries which joined the EU in 2004 and the sixth-largest EU member, "will not accept the fact that you have global negotiations, the agenda of those meetings is extended and you don't have a political mandate granted by the member states to the ones who want to go," Poland's Europe Minister Mikolaj Dowgielewicz told Deutsche Presse-Agentur dpa.

"This is a serious issue for consideration by the EU in the coming weeks and months," he said.

The Group of 20 (G20) most powerful economies is set to hold a summit on the financial and economic crisis in London on April 2.

European members of the group met in Berlin on February 22 to discuss the forthcoming summit.

But to the fury of mid-weight EU states, non-G20 members Spain and the Netherlands were also invited to the meetings, having demanded and been given a place at a G20 summit in Washington in November.

That led the foreign ministers of Belgium, Finland, Sweden, Poland, Portugal and Luxembourg to protest the "non-transparent" way of issuing invitations at a meeting in Brussels on Monday.

Britain is set to host the April summit as the current holder of the G20's rotating presidency. British diplomats say that they have simply invited the same states as were invited to Washington.

The current holder of the EU's presidency is the Czech Republic, which is due to attend the London summit in that capacity. dpa