"We, as Turkey, will pursue our constructive efforts to resolve this crisis because we see the stability and security in Gulf region as our own".
Despite Tillerson's plea for "no further escalation", Trump's sharp comments were likely to further embolden Saudi Arabia and the others in their bid to isolate Qatar.
Mauritania, an Arab League member, cut ties on Tuesday and central African oil producer Gabon condemned Qatar for failing "on counter-terrorism". Saudi Arabia said its action followed the conclusions of last month's Arab Islamic American Summit in Riyadh, where Trump delivered a speech about Islamic extremism.
"The [counter terrorist-financing] challenges they face aren't unique to them", said the official, who spoke on condition of anonymity. "There are humanitarian consequences to this blockade".
He said families were being separated, children removed from school and Qataris forced to deal with food shortages.More news: 'Dead Woman Walking': Amid Election Fallout, Theresa May Stands On Shaky Ground
U.S. Secretary of State Rex Tillerson and Turkish counterpart Mevlut Cavusoglu discussed developments in Syria and in the row between Qatar and its fellow Arab states on a phone call late on Saturday, Turkish foreign ministry sources said.
The Pentagon said the blockade was hindering USA ability to plan for long-term operations in the region.
A separate SPA report on Saturday acknowledged Tillerson's call for Qatar to curtail support for terrorism, without mentioning that he had also said the crisis was hurting ordinary Qataris, impairing business and harming the US fight against the Islamic State militant group.
Still, the Pentagon has been developing contingency plans in case there's any interruption, defense officials said. Aircraft that fly out of Qatar - including fighter jets, drones and refueling planes - can be relocated, they said. Qatar's neighbors have also criticized Qatar for allegedly supporting groups like the Muslim Brotherhood and Hamas. "Process can only work following clear indication that Qatar will stop support & finance of extremism & terrorism".
The crisis is a major diplomatic test for the United States, which is a close ally of countries on both sides.
New Delhi asked its citizens in Qatar and other Gulf countries to keep in touch with embassies and consulates of India for assistance in case of any eventuality.