ANKARA (Reuters) - A delegation of Turkish officials will head to Washington in two days to discuss an ongoing row between the two NATO allies, broadcaster CNN Turk reported on Tuesday, citing diplomatic sources.

A pedestrian passes the Embassy of Turkey in Washington, U.S., August 6, 2018. REUTERS/Brian Snyder

Relations between the two countries have steadily worsened, strained by differences on Syria policy and over the trial of U.S. pastor Andrew Brunson in Turkey. A trade spat between the two sent Turkey’s lira currency to plunge to a record low on Monday.

Over the weekend, the U.S. Trade Representative said it was reviewing Turkey’s duty-free access to the U.S. market, after Ankara imposed retaliatory tariffs on U.S. goods in response to American tariffs on steel and aluminum. The move could affect $1.7 billion of Turkish exports.

On Tuesday, CNN Turk cited diplomatic sources saying that Ankara and Washington had reached pre-agreements on certain issues, but it did not elaborate.

The Turkish government was not immediately available for comment, and the U.S. State Department did not respond to a request for comment.

U.S. President Donald Trump’s administration has demanded that Turkey release Brunson, an evangelical pastor who has lived in Turkey for more than two decades and has been charged with supporting a group that Ankara has blamed for an attempted coup in 2016. He has denied the accusations.

Last week, Washington imposed sanctions on President Tayyip Erdogan’s justice minister and interior minister, saying they played leading roles in organizations responsible for Brunson’s arrest.

Erdogan said that Turkey would retaliate by freezing assets of the U.S. interior and justice ministers in Turkey “if they have any.”

The Turkish currency, which has lost 27 percent of its value this year, fell some 5.5 percent to a record low of 5.4250 against the dollar on Monday, its biggest single-day drop in nearly 10 years.

The lira firmed as far as 5.2625 against the dollar after reports of the delegation going to Washington, and traded at 5.2672 at 2238 GMT.