Police confiscated several thousand recordings April 10, many including conversations between investigators, during a search of a hideout of the ultra-leftist Kakumaru-ha (Revolutionary Marxist Faction).

Police suspect high-powered receivers found at the hideout in Urayasu, Chiba Prefecture, were used to eavesdrop on their radio conversations. The Metropolitan Police Department's Public Security Bureau confiscated not only the tapes but also the receivers and documents. The items filled about 80 cardboard boxes.

A two-day search was started Thursday morning in connection with the leak of prosecution documents on a Kobe teenager who killed two schoolchildren last year. Police put six Kakumaru-ha members on a nationwide wanted list Tuesday on suspicion of stealing copies of prosecution depositions on the 15-year-old boy from a Hyogo prefectural hospital in Kobe. A doctor who conducted psychiatric tests on the boy works at the hospital.