31.   Russian officials have theorized that the Kursk collided with a foreign submarine, setting off the powerful blasts.

32.   Russian officials repeatedly have suggested that the Kursk collided with a foreign submarine, but say an internal explosion could also be at fault.

33.   Russian officials have speculated that the Kursk collided with another vessel in the Barents Sea, and usually blame an unspecified foreign submarine.

34.   Russian officials say they are focusing on indications that the Kursk collided with an underwater object, possibly a foreign submarine.

35.   The Russians have said they suspect the accident resulted from a collision with a foreign submarine, although no definitive cause has been identified.

36.   The Taiwanese military said Tuesday it detected what it believed was a foreign submarine off the Penghu island group last week, and reports identified the craft as Chinese.

37.   The Russians have voiced suspicion that the explosion was caused by a collision with a foreign submarine.

38.   The sinking of the Russian nuclear submarine Kursk was not caused by a collision with a foreign submarine, the leading investigator said Saturday.

39.   They blame instead a collision with a foreign submarine.

40.   They say the disaster could have been caused by collision with a foreign submarine, a World War II mine or an internal malfunction.