Syria-based PYD should not be considered as a reliable partner for defeating DAESH, Turkish Foreign Minister Mevlut Cavusoglu said at the fifth Turkish-British Tatlidil Forum in London on Saturday.
Cavusoglu differed from the views of his British counterpart, Philip Hammond, who said PYD should be part of the political process in Syria.
"A terrorist organisation should never be a reliable partner to defeat another terrorist organisation," Cavusoglu said.
"In this case, my opinion is a bit different compared to Philips regarding the PYD - the PYD and the PKK are the same - there is no difference. When you look at the structures of the PYD, you can see elements of the PKK," he added.
The Turkish minister highlighted the links between Russia, the Syrian Assad-regime and PYD.
"PYD is not only an ally of the regime, but also an ally of Russia.
Cavusoglu criticised the approach and pointed out that an Al Qaeda affiliated group, Al Nusra, is also fighting DAESH.
"From time to time, Al Nusra is also fighting DAESH for their interest, we cannot legitimize a terrorist organisation just because they are also in conflict with other terrorist groups," he said.
Cavusoglu said the international coalition forces were enough to defeat terrorist organisations with a predetermined result oriented strategy that do not need other "terrorists."
Turkey and the UK will continue to work closely to find a political solution to the conflict in Syria, the foreign minister added.
"We should put pressure on the regime and Russia to commit to a political process. However, Russias actions in recent years do not give us reason to be optimistic," he said.
British foreign secretary also addressed the Tatlidil Forum, a platform established in 2011 to enhance Turkish - British relations.
While Syrias territorial integrity is a non-negotiable issue for the UK, PYD should be involved in the political process in Syria, Hammond said.
He acknowledged that Turkey paid a heavy price in the Syrian conflict and praised the country's generosity in hosting millions of refugees.
He noted that Turkey played a "critical role" in stemming the flow of foreign fighters travelling to join the DAESH terrorist group.
"As a NATO ally and strategic partner, Turkey's security concerns must be our security concerns," Hammond said.
"We cannot allow northern Syria to become a launch pad for any future hostile action against our NATO ally.