A Washington restaurant has apologized after they inadvertently hosted a dinner for a group of white nationalists including Tila Tequila who performed Nazi salutes as they celebrated Donald Trump's election win.

Maggiano's Little Italy in Friendship Heights say they agreed to a reservation from the National Policy Institute, who the restaurant claim gave a fake name when they booked their party.

But they were later shocked when the dinner ended with some of the group performing Nazi salutes to mark Trump winning the race to the White House.

The National Policy Institute held a party at Maggiano's Little Italy in Washington where some including reality TV star Tila Tequila, right, were pictured making Nazi salutes

Tequila later tweeted the picture with the caption 'Sieg heil', but her account has now been suspended

Among the group was former reality TV star Tila Tequila, who then posted a picture of herself performing the gesture alongside two men on Twitter with the caption 'Seig Heil.' Her Twitter account has now been suspended.

And after realizing the group dining at their venue were from the white nationalist group, the restaurant announced they would be donating the proceeds of the money paid by them to the Anti-Defamation League.

In a statement posted on their Facebook page, Maggiano's Little Italy wrote: 'On Friday night, Maggiano’s in Friendship Heights was the inadvertent site of a protest that caused us to close our restaurant to protect the safety of our Teammates and Guests.

'The protesters were upset because of a banquet we were hosting for a group called the National Policy Institute (NPI). This was a last minute booking made Friday afternoon, and the reservation was made under a different name, therefore we were not aware that NPI was dining with us or what the group represents.

'After the event, an attendee sent a tweet in which she made a "Sieg Heil salute" in support of Hitler and white supremacy. This expression of support of Hitler is extremely offensive to us, as our restaurant is home to Teammates and Guests of every race, religion and cultural background.

Now the restaurant has issued an apology for hosting the party, saying they inadvertently accepted the booking

The group had gathered at the restaurant to celebrate the election win of Donald Trump, who they had been supporting during the election campaign

'We want to sincerely apologize to the community of Friendship Heights for inadvertently hosting this meeting, which resulted in hateful sentiment.

'We want you to know that at the suggestion of one of our Guests, we are donating the profits from our restaurant sales on Friday, $10,000, to the DC office of the Anti-Defamation League, which for decades has been working to bring people together in peace and understanding.'

The NPI, a far right-wing group part of the so-called 'alt-right', latched onto to the Trump campaign - and some of its leaders say his victory has given them a big boost.

Violent and bloody battles broke out between protesters and attendees at a conference organized by the group on Saturday.

The NPI had been in Washington DC for a conference, where scuffles broke out between protesters and attendees

At least one person was injured with a bloody gash to his forehead when the two groups clashed outside the Ronald Reagan Building and International Trade Center in downtown Washington DC.

A number of protesters descended on the white nationalists conference, shouting: 'Fascists, we will shut you down!'

More than 250 are thought to have attended the conference, where panel discussions included 'Trump and the new white voter,' and 'Trump and being a man,' according to The Daily Beast.

Trump and Harambe merchandise was also sold.

At least one person was injured with a bloody gash to his forehead when the two groups clashed outside the Ronald Reagan Building and International Trade Center