A warrant has been issued for a private school teacher in Westchester after he failed to appear in court.

Prosecutors say Nils Koehler is accused of having an inappropriate relationship with a 14-year-old student at the German International School in White Plains.

The 27-year-old was arraigned last week.

He was scheduled to return to court Tuesday but did not show up, prompting a judge to issue the warrant.

A temporary order of protection has also been issued for the student.