Agencies (Qasioun) - Qatar is reported to have filed an official complaint with the World Trade Organization (WTO), aimed at challenging an ongoing trade boycott by Saudi Arabia, Bahrain and United Arab Emirates.
The formal step would mark the first step in the WTO's dispute process.
It means the countries would have to sit down with Qatar to negotiate.
But if a settlement can't be reached within 60 days, the dispute would go to a WTO-appointed panel.
Reuters news agency first reported that the complaint had been filed.
The WTO told the BBC it had not received any information so could not confirm the report.
Saudi Arabia, Bahrain and the United Arab Emirates (UAE) cut ties with their Gulf neighbour on 5 June, saying it supports terrorism. They also gave Qatari citizens 14 days to leave their territory and banned their own citizens from travelling to or residing in Qatar.