Turkish President Recep Tayyip Erdogan prepares for an interview in New York City. Photo: Reuters / Brendan McDermid

In closed-door meetings with US national security officials, Turkey threatened to step up military action against US-allied Kurdish fighters in Syria, reports the Washington Post.

The message came after the Trump administration’s decision to arm Syrian Kurds in advance of an assault on the city of Raqqa.

“Turkey’s message to the Trump administration was that Turkey reserves the right to take military action,” according to a senior Turkish official quoted by the Washington Post. The official explained that Turkey has already conducted limited strikes against the US-backed Kurds in Syria, but it could increase the frequency of strikes.