Boris Johnson pulled out of a planned press conference with Luxembourg Prime Minister Xavier Bettel on Monday after he was met by noisy protests.

The UK prime minister was due to field questions from journalists at an outdoors event following meetings with Bettel and the European Commission president, Jean-Claude Juncker.

However, protesters greeted the UK prime minister with loud boos and protest songs.

Bettel went ahead with the press conference without Johnson.

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Boris Johnson pulled out of a planned outdoors press conference with Luxembourg's prime minister on Monday after he was greeted with the deafening sound of protesters gathered on the streets to meet him.

The UK prime minister was due to field questions from European journalists after meeting for talks with the European Commission president, Jean-Claude Juncker, and Luxembourg's prime minister, Xavier Bettel.

However, Johnson was met by boos from protesters before the press conference. Officials initially suggested that they would issue a prerecorded playback of Johnson and Bettel later on Monday.

Read more: Boris Johnson called 'Trumpian' and 'infantile' by EU figure after comparing Brexit to the Hulk smashing out of his chains

Bettel instead made a statement to the press alone, standing alongside an empty lectern intended for Johnson. Bettel used the opportunity to accuse Johnson of seeking to push the blame for the Brexit impasse onto Europe.

"Brexit is not my choice," Bettel said, adding, "Don't put the blame on us because now they don't know how to get of this situation they put themselves in."

Johnson's team had asked for the press conference to be moved inside, but Luxembourg officials reportedly rejected that, telling UK officials there wasn't enough space.

Johnson later told the BBC that he pulled out because "there was clearly going to be a lot of noise, and I think our points might have been drowned out."

Watch protesters in Luxembourg boo Johnson:

Protesters sang "Ode to Joy" and shouted "We are the smiling piccaninnies of Luxembourg," a reference to Johnson's previous offensive comments about black Africans.

Read more: Boris Johnson called gay men 'tank-topped bumboys' and black people 'piccaninnies' with 'watermelon smiles'

Johnson had earlier met for lunch with Juncker to discuss potential changes to the EU Withdrawal Agreement drawn up by Johnson's immediate predecessor, Theresa May.

But little progress was made, according to a readout from the European Commission.

"President Juncker recalled that it is the UK's responsibility to come forward with legally operational solutions that are compatible with the Withdrawal Agreement," a spokesman said in a statement, adding that "such proposals have not yet been made."

A representative for Johnson said that the prime minister had told Juncker that he would not request another delay to Brexit, despite legislation passed this month by members of UK Parliament requiring him to do so if an agreement has not been ratified by October 31.

They added that talks would accelerate between the two sides over the coming days.