The Doha Skyline at the Sheraton Grand Hotel on November 17, 2016 in Doha, Qatar.

The four Arab states leading the boycott against Qatar said late on Thursday that Doha's refusal of their demands to resolve a Gulf diplomatic crisis is proof of its links to terror groups and that they would enact new measures against it.

Saudi Arabia, the United Arab Emirates, Egypt, and Bahrain released a joint statement carried by the countries' state media saying their initial list of 13 demands was now void and pledging new political, economic and legal steps against Qatar.

The Qatari government sabotaged diplomatic efforts to solve the rift, the four states said, and its refusal affirmed its continuing sabotage of the region's stability and security.