Donald Trump has ramped up his criticism of the federal judges who suspended his travel ban.

It comes after other judges rejected his appeal to have his executive order immediately reinstated.

On Friday, federal judge James Robart halted the order that temporarily blocked all refugees and citizens of seven Muslim-majority countries from entering the US.

The 9th US Circuit Court of Appeals on Sunday denied a formal request by the US Department of Justice to lift the ruling.

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The hearing gave the Trump administration until Monday afternoon to file more arguments before a final decision is made - meaning the ban could be up and running again soon.

On Twitter, Mr Trump said: "I have instructed Homeland Security to check people coming into our country VERY CAREFULLY. The courts are making the job very difficult!

"Just cannot believe a judge would put our country in such peril. If something happens blame him and court system. People pouring in. Bad!"

Image: The President attacked the judge in a series of tweets on Saturday

Many of those caught up in Mr Trump's travel ban last weekend took advantage of the suspension of the order to complete their disrupted journeys to the US.

They included Eman Ali 12, and her father, Ahmed, who arrived together on Sunday at San Francisco International Airport, where they were greeted by her older sister and other relatives.

She ran to embrace her sister, and the two hugged and cried.

Eman and her father had been stuck in the east African nation of Dijbouti since last Monday, when authorities refused to let her board a plane with him to the US as she is from Yemen.

Mr Ali criticised Mr Trump's order: "It's not fair. I mean some people they are bad, but that doesn't make everybody bad."

Acting solicitor general Noel Francisco argued on Saturday night that the President's authority is "largely immune from judicial control" when it comes to deciding who can enter or stay in the US.

In a personal attack on Judge Robart on Saturday, Mr Trump described him as a "so-called judge" in another series of ill-tempered tweets.

Image: The ban has sparked protests across the world, including this one at LA airport

He accused the Seattle judge of opening "up our country to potential terrorists and others that do not have our best interests at heart".

The President's decree, signed on 27 January, barred entry for 120 days of any refugees awaiting resettlement.

Citizens from Iran, Iraq, Libya, Somalia, Sudan, Syria and Yemen were also banned for 90 days.

Meanwhile, the White House announced on Sunday that Mr Trump will meet NATO leaders in May.

Mr Trump expressed "strong support for NATO" but called on European members to pitch in more, the White House said in a statement.