The Tokyo District Court on Jan. 14 ordered the Tokyo Metropolitan Government to pay 3 million yen to five plaintiffs for unlawfully investigating them in connection with the planting of a time bomb at the official residence of the head of the Metropolitan Police Department. The plaintiffs, including writer Hiromi Fukutomi, 63, were arrested and indicted in 1971 for the attempted bombing but were later acquitted.In addition to the metropolitan government, the national government, prosecutors and police were also named in the suit, which was filed in March 1986, over their involvement in the investigations. The district court, however, rejected demands for redress from the other named parties.A police officer on security duty at the residence discovered the homemade time bomb early on Aug. 7, 1971. The device was neutralized before it could explode and the would-be bomber fled. Fukutomi and one other person were arrested in a separate theft case in November of that year. They, plus the other three plaintiffs in the suit, were all indicted in December on charges of violating the Explosives Control Law.The court ruling said it would be difficult to prove the two plaintiffs' arrest in connection with the theft was unlawful. It also said that it was not unreasonable for prosecutors to indict the five in light of the testimony they gave during the police investigation.