MOSCOW, January 21 (RIA Novosti) - A school pupil of Armenian origin was killed in Moscow, a source in the law-enforcement bodies of the Russian capital said Sunday.

"The body of 16-year-old Artur Martirosyan with a stab injury of the left side of the chest was found Friday morning at 45 Kastanayevskaya Street," the source said.

According to the source, a seventh-form pupil, registered in the town of Tomilino in the Moscow region, resided with his parents in a rented apartment in Moscow since 2003.

A criminal investigation has been launched, the source said.