ANKARA, April 20 (Reuters) - Turkish President Tayyip Erdogan said on Thursday he would meet his U.S. counterpart Donald Trump in Washington on May 16-17, in their first meeting since Trump took office in January.

Ties between the United States and Turkey have deteriorated sharply since a failed military coup in July and disagreements over U.S. support for a Kurdish militia group fighting Islamic State in Syria. Turkey sees the group as an extension of the outlawed PKK, which has waged a three-decade insurgency for Kurdish autonomy in southeastern Turkey.