"Free EU visa travel for 75 million Turkish citizens is another reason to vote to leave the EU and take back control of our borders," Nigel Farage said on the UKIP Facebook page.
Having termed a visa-free deal with Turkey as a form of "collective insanity," Farage emphasized that it would "give free run to the Islamic State fighters, weapons and oil."
The UKIP is a eurosceptic, right-wing political party in the United Kingdom, supporting the country's exit from the European Union, increased military budgeting and increasingly strict conditions and limitations for immigration.
The European Union is currently struggling to manage a massive refugee crisis, with hundreds of thousands of people leaving conflict-torn countries in the Middle East and North Africa for Europe. Over a million illegal border crossings have been detected by the EU border agency Frontex since the beginning of 2015.
Nearly 2.2 million Syrian refugees are temporarily living in Turkey. The European Union is attempting to prevent their travel to the bloc by giving Turkey money to provide for decent refugee living conditions.