Ankara - Turkey's president has warned of an "ethnic and sectarian" war in response to the Iraqi Kurdistan referendum, while the Iraqi prime minister has ruled out talks with the Kurdistan Regional Government (KRG) over the outcome of the controversial vote. In a televised speech from Ankara on Tuesday, Recept 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.Referendum viewed as a threat 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."It will be over when we close the oil taps, all [their] revenues will vanish, and they will not be able to find food when our trucks stop going to northern Iraq," Erdogan said.Iraq's Kurds on Monday voted in a key referendum despite fierce opposition from Baghdad, as well as neighbouring Turkey and Iran.Turnout was reportedly at 72%, with 3.3 million of the 4.58 million registered voters taking part, Shirwan Zirar, the election commission spokesperson, said late on Monday.Results were expected within 24 hours, with an overwhelming "yes" vote not in doubt.Erdogan described the vote as a "treason to our country" since it had come at a time of good relations between Turkey and its neighbour, the KRG.He urged Barzani to "give up on an adventure which can only have a dark end".Iraq's reactionLate on Monday, Haider al-Abadi, Iraq's prime minister, also angrily reacted to the vote, saying: "We are not ready to discuss or have a dialogue about the results of the referendum because it is unconstitutional."On Tuesday, Turkish and Iraqi troops began joint military exercises in Habur, near Turkey's southeastern border with Iraq, a Turkish military statement said.Tuesday's drills will conclude Turkey's military exercises in its southeastern region, which began on September 18, a week before Monday's vote.In Iran, home to millions of ethnic Kurds, Ali Akbar Velayati, chief foreign policy adviser to Iran's Supreme Leader Ayatollah Khamenei, said the vote would trigger "political chaos", while the country's Islamic Revolutionary Guard Corps (IRG) announced it was sending new missile equipment to the border. "The honourable people of Kurdistan will not bear this disgrace," Velayati was quoted by the semi-official ISNA news agency as saying.Provoking separatists?As with Turkey, Iran strongly opposes independence for the Iraqi Kurds, fearing it will provoke separatists among its own Kurdish population.State television made a rare admission on Tuesday that Kurds in Iran's northwestern border region had held peaceful demonstrations in support of the referendum."People in the cities of Sanandaj, Baneh and Saghez of Kurdistan province held peaceful gatherings congratulating their Iraqi fellow Kurdish-speaking people," broadcaster IRIB reported.Iran is also worried about ties between the Kurds and Israel, the only government in the region that has supported Kurdish efforts toward statehood.READ MORE: A look at Iraq's Kirkuk before the referendum"Unfortunately, Barzani has been connected to the Zionists since long ago and hasn't learned a lesson from Palestine," said Velayati.Iran has also blamed its traditional enemies - the Americans and British - despite their firm opposition to the referendum.Meanwhile, Alireza Elahi, deputy head of the IRG aerial headquarters, said it had "sent new missile equipment to the western region to boost the aerial defence and preparedness against any violation".At least one Iranian legislator, however, called for a more conciliatory stance now that the vote has gone ahead."The referendum does not mean independence for Iraqi Kurdistan. There is a process which, if implemented, will take two to three years. So we should not be so sensitive and should only make clear to Kurdish people that this is not in their interest," Ali Motahari was reported by ISNA as saying.