1.   He hired helicopters to fly over competing boats to get photos of masts and keels, and even set up a decoy spy boat.

2.   Using intelligence from American military spy satellites, the Japanese Coast Guard keeps a close watch for North Korean spy boats that approach Japanese territorial waters.

3.   But North Korea denied sending any spy boat into South Korean waters and disowned the bodies.

4.   In December, South Korean military sank a North Korean spy boat, and in June a North Korean submarine was found in South Korean waters.

5.   Meanwhile, another news report said that the Defense Agency has collected intelligence that suggests the waters off Japan are rife with spy boats.

6.   North Korea on Monday denied infiltrating a spy boat into South Korean waters last week, calling the allegation an anti-North smear campaign.

7.   Relations between Tokyo and North Korea have also deteriorated since a suspected North Korean spy boat infiltrated Japanese waters in December.

8.   Relations between Tokyo and Pyongyang, North Korea, have also deteriorated since a suspected North Korean spy boat infiltrated Japanese waters in December.

9.   Soldiers in pursuit opened fire, assuming that it was a North Korean spy boat.

10.   That brought the number of bodies recovered from the communist spy boat to six.