Turkey's state-run news agency says Turkey has ended negotiations with China on building a missile defense system.

The Anadolu Agency, citing unnamed officials, said Sunday that Prime Minister Ahmet Davutoglu decided to abandon the missile tender over the possibility that Turkey may construct its own "national" defense system.

The deal with China had been a source of tension with NATO partners, who said they would not integrate Chinese-made hardware with a European-wide system.

The indications that the deal is being abandoned come as leaders from the 20 leading world economies — including China and NATO allies — are meeting in Turkey in the wake of the deadly attacks in Paris.

Western leaders are discussing how to respond to the attack that French President Francois Hollande called an act of war.