11.   In the Pueblo incident, the North Koreans did obtain classified material from the American spy ship.

12.   Intrusion of suspected spy ships leaves Japan shaken.

13.   Japanese coast guard vessels fired Saturday on an unidentified fishing boat suspected to be a spy ship, setting it ablaze as it fled, officials said.

14.   Japan suspects the vessel of being a North Korean spy ship or drug-smuggling boat, and wants to determine its origin.

15.   Japanese relations with North Korea have deteriorated following the December gunbattle between the Japanese Coast Guard and a suspected North Korean spy ship.

16.   Japanese officials say suspected spy ships enter North Korea.

17.   Japanese patrol vessels fired Saturday on an unidentified fishing boat suspected to be a spy ship, setting it ablaze as it fled, officials said.

18.   Last month, naval destroyers were deployed for the first time since the war chase away suspected spy ships, which fled to North Korean waters.

19.   Last month, Japanese naval destroyers fired on a pair of suspected spy ships, which Japan later claimed were North Korean.

20.   North Korea denied sending two suspected spy ships into Japanese waters earlier this week and blamed rival South Korea for the incursion, Japanese officials said Friday.