US Ambassador to the UN Nikki Haley has said that the crisis between Qatar and other Gulf states is "an opportunity" to influence both Qatar and Saudi Arabia.

Haley was testifying before the House Foreign Affairs committee on Wednesday when she was asked about her take on the crisis in the Gulf amid conflicting statements made by members of the Trump administration.

She said the US "should take it [the crisis] as the opportunity that it is".

She said it was a good time to tell Qatar to "quit funding Hamas ... but at the same time, go back to Saudi Arabia and say look you can talk to them [the Qataris] ... you got to cut this out, you've got to stop doing this."

Haley added that it was "an opportunity to sort of hit on both of them".

Saudi Arabia, the UAE, Bahrain and Egypt cut diplomatic ties with Qatar and imposed sanctions on the country on June 5, accusing it of supporting "terrorism".

The four countries have not provided any evidence for their claim, while Qatar has repeatedly rejected the allegation.

Last Thursday, the Saudi-led bloc issued a 13-point demand list in exchange for the end of the anti-Qatar measures and gave a 10-day deadline.

The demands included, among others, that Qatar shut down the Al Jazeera media network, close a Turkish military base and scale down ties with Iran.

Over the three two weeks, US President Donald Trump has taken a tougher stance against Qatar, while the state department and the pentagon had previously sought to remain neutral in the Gulf crisis.

US Secretary of State Rex Tillerson said some demands on Qatar by a group of Arab countries that have imposed a blockade against it "will be very difficult to meet".

Nevertheless, in a statement issued on Sunday, Tillerson said the list submitted by Saudi Arabia, the UAE, Bahrain and Egypt includes "significant areas which provide a basis for ongoing dialogue leading to a resolution".

Meanwhile, a top Qatari human rights group said Wednesday it will employ Swiss lawyers to seek compensation for those impacted by the decision of Gulf countries to cut ties with the emirate.

Ali bin Smaikh Al-Marri, chairman of Qatar's National Human Rights Commission, said his group would take action against Saudi Arabia, the United Arab Emirates and Bahrain, which cut ties with Qatar this month.

Marri refused to say which Swiss firm would be employed, but said a statement would be released in the near future.

On June 5, Saudi Arabia, the United Arab Emirates, Egypt and Bahrain announced the suspension of political, economic and diplomatic ties with Qatar, accusing the emirate of support for extremist groups -- a claim Doha denies.