ANKARA, Turkey — Turkey and the United States exchanged new threats of sanctions Aug. 17, keeping alive a diplomatic and financial crisis that is threatening the economic stability of the NATO country.

ANKARA, Turkey — Turkey on Aug. 15 said it is increasing tariffs on imports of certain U.S. products, including rice, cars, alcohol and coal — escalating a feud with the United States that has helped trigger a currency crisis.

Turkey’s president appeared to escalate a dispute with the United States that has helped foment a Turkish currency crisis, claiming Aug. 14 that his country will boycott U.S.-made electronic goods. Behind the scenes, however, diplomats resumed contact to ease tensions.