EU leaders have delayed their June summit by several days, thereby avoiding a clash with Britain's referendum on EU membership, an official said Friday.

"The June meeting of the European Council confirmed for 28-29 June," Preben Aamann, a spokesman for EU president Donald Tusk, said in a tweeted message.

The EU leaders were initially due to begin a regular two-day meeting on June 23, the same day as the Brexit vote in Britain.