According to Deadspin, the chief prosecutor in Istanbul filed an international arrest warrant for Enes Kanter.
The prosecutor's office officially charged Kanter with charges of supporting a terrorist organization.
Kanter is a center for the New York Knicks, who recently chose to stay home, instead of heading to London for a game against the Washington Wizards.
Turkish authorities are also seeking an Interpol Red Notice, to formally request his extradition to Turkey.
Kanter was charged because of his longstanding and outspoken support of Fethullah Gulen, a Turkish cleric living in exile.
Gulen has been accused by Turkish authorities of organizing a failed military coup back in 2016.