DENVER, Colo. – A Ukrainian man was arrested for allegedly making unwanted sexual advances on two flight attendants aboard a Delta Airlines flight that landed at Denver International Airport on Monday night, federal authorities said.

Vadym Pecherskyi, 42, of Kiev, Ukraine, faces possible charges of interference with flight crew members. Pecherskyi is scheduled to appear before a U.S. Magistrate Judge in Denver Wednesday, when he will be advised of his rights and the charges pending against him.

Just after 9 p.m. on Monday, an FBI agent was notified by the DIA Communications Center that a disturbance had occurred onboard Delta Flight 2525 from the Atlanta airport to DIA.

At DIA, the FBI agent learned that Pecherskyi had made sexual advances toward two female flight attendants. The man had been served at least two alcoholic drinks before his improper behavior began, according to a news release issued by U.S. Attorney John Walsh and FBI Denver Division Special Agent in Charge Thomas Ravenelle.

As a result of his sexual advances, both flight attendants felt they could not adequately perform their assigned duties aboard the airplane, authorities said, A passenger onboard the flight also confirmed the defendant’s advances toward the flight attendants.

A conviction for interference with flight crew members carries a maximum penalty of 20 years in federal prison and a $250,000 fine.

This case was investigated by the FBI and Denver Police Department.