The four suspects—two 15-year-old boys, a 17-year-old girl and an 18-year-old man—were taken into custody on Saturday, the Tokyo MetropolitanPolice Department said.
TheMetropolitanPolice said the threat was not specific regarding location or time.
大都会警方说,这次威胁没指名具体地点或时间。
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TheMetropolitanpolice said the loophole was a key reason why it could not reopen its inquiry into the extent of phone hacking by News of the World staff.