A Hawaii federal judge has halted US President Donal Trump’s revised travel ban just hours before it was due to come into force.

The decision by US District Judge Derrick Watson blocks a 90-day ban on new visa approvals for people from six Muslim-majority nations.

The new order would ban all immigrants or non-immigrant entry of citizens from Syria, Yemen, Sudan, Somalia, Iran and Libya.

Trump, who was addressing a supporters rally as news of the judgment broke, branded it “an unprecedented judicial overreach” and vowed to appeal the decision in court.