OSAKA -- The Kinki Postal Administration Office in March paid for a meeting in Osaka of a group of special post office heads connected with an election violation case surrounding Kenji Koso, a newly elected House of Councilors lawmaker in the ruling Liberal Democratic Party, investigative sources said.

The office also paid for a business liaison conference for special post office heads that was held immediately after the private organization's meeting, the sources said Thursday.

Meanwhile, one of the post office heads in attendance at the meeting reportedly later told police that he was told to destroy documents related to the election. The request came when police began investigations the day after the election, the sources said.