The Iraqi government has threatened to impose an international air embargo on the Kurdistan Regional Government (KRG) if it does not hand over control of its airports, as Kurdish leader Masoud Barzani says his people voted in favour of independence.
On Tuesday, Barzani announced that the majority of Kurdish voters supported secession in Monday's referendum.
The results came shortly after Prime Minister Haider al-Abadi said that the KRG has until 3:00pm local time (12:00 GMT) on Friday to transfer control of the airports to the Iraqi government.
The embargo threat is the latest in a string of retaliatory measures against the KRG's push for secession.
Domestic flights are not involved in the ultimatum and in the worst case, international travel to and from the KRG will be rerouted through Baghdad and other Iraqi airports.
Baghdad last week asked foreign countries to stop direct flights to the international airports of Erbil and Sulaymaniyah, in KRG territory, but only Iran declared such an air embargo, halting direct flights to and from the semi-autonomous Kurdish region in northern Iraq.
Humanitarian and "emergency" flights are exempted, provided they are preapproved by Baghdad, Abadi said.
Baghdad will also ask neighbouring countries to shut the border with the Iraqi Kurdish region if the KRG does not hand over border posts to the central government by Friday.
In response, Barzani urged the world to "respect the will of millions of people" who voted in Monday's referendum. He called on Baghdad to engage in a "serious dialogue" with the KRG.
'Left in a lurch'
In a televised speech from Ankara on Tuesday, Turkish President Recep Tayyip Erdogan threatened to impose sanctions against the semi-autonomous Kurdish region, saying it "will be left in a lurch" and its people would go hungry.
"If [Iraqi Kurd leader Masoud] Barzani and the Kurdish Regional Government do not go back on this mistake as soon as possible, they will go down in history with the shame of having dragged the region into an ethnic and sectarian war," Erdogan said.
The comments came as Iraqi troops joined the Turkish army for joint military exercises near Turkey's border with northern Iraq.
Turkey has long been northern Iraq's main link to the outside world, but sees the referendum as a threat to its own national security, fearing it will inflame separatism among its own Kurdish population.
Source: News agencies