A woman school teacher in Russia's European exclave of Kaliningrad faces up to four years behind bars for allegedly seducing three male teenaged students during a lesson in her apartment, officials said.

"In October 2011, a 36-year-old resident of Svetlogorsk district had sexual contact with two 14-year-old young men and one 15-year-old who came to take an extracurricular music class," the investigative committee said.

The teenagers allegedly had sex with their teacher "not in turn, but all at once", an investigator said.