11.   A foreign submarine has been spotted close to Russian territorial waters in the Far East, officials said Monday.

12.   An internal malfunction, a collision with a World War II mine or a collision with a foreign submarine are likely causes, they said.

13.   Defense Minister Igor Sergeyev went on television to air the theory, and Russian officers claimed fragments of a foreign submarine were found near the Kursk.

14.   For months, Russian officials insisted that the most likely cause was a collision with a foreign submarine or ship.

15.   However, the government has not officially ruled out the theory that the Kursk collided with another vessel, possibly a foreign submarine.

16.   Klebanov said Sunday a Second World War mine or a collision with a foreign submarine were possible scenarios.

17.   Klebanov said there were up to three foreign submarines in the area when the Kursk was lost.

18.   Klebanov said Sunday a World War II mine or a collision with a foreign submarine were possible scenarios.

19.   Klebanov said there were up to three foreign submarines in the area when the Kursk was lost and that requests for information from foreign countries had not been answered.

20.   Klebanov said Sunday that a World War II mine or a collision with a foreign submarine were possible causes.