The Southhampton school board announced Friday that it has accepted the resignation of Superintendent Scott Farina — whose conduct is under investigation — effective immediately.

Longtime administrator Nicholas Dyno, the district’s assistant superintendent for instruction, was appointed interim superintendent.

Board President Heather McCallion read a statement announcing the moves during a sparsely attended special meeting that lasted only four minutes.

“The Board of Education and Dr. Farina have reached an agreement to mutually terminate their relationship in the best interest of the school district,” McCallion said.

The resolutions were passed unanimously by the board. McCallion and other board members declined to comment afterward.

Dyno, who attended the meeting held in the Southampton Intermediate School library, said he would not comment “at this time.”

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The meeting followed weeks of speculation and a district investigation into Farina’s conduct that remains confidential.

In February, the board hired a private attorney to look into unspecified misconduct claims made against the superintendent. McCallion has not disclosed details about the source or nature of the allegations, but said earlier that the “process will be completed in the next few weeks.”

In a statement to Newsday in March, Steve Politi, a Central Islip-based attorney representing Farina, said any claims of misconduct were unfounded and had come from a former girlfriend.

Politi could not be reached for comment Friday.

Board members confirmed that an emergency meeting to discuss Farini’s status was held last Saturday.

Separately, state Comptroller Thomas DiNapoli’s office confirmed in March that it had begun an audit of the district. It was not clear if that audit was related to the investigation into Farina.

Farina’s ouster comes just before the board is to begin its budget approval process for the upcoming school year.

With Laura Blasey