3 Other Probes Under Way

With the release of the report of the Tower Commission today, three major investigations are still looking into the secret arms sales to Iran and the reported diversion of profits to the Nicaraguan rebels.

The current investigations, which could lead to indictments, include:

--The Senate select committee headed by Sen. Daniel K. Inouye (D-Hawaii) and co-chaired by Sen. Warren B. Rudman (R-N.H). The Senate panel has until August to compile a report.

--The House select committee headed by Rep. Lee H. Hamilton (D-Ind.), which has until October to file its report.

--Independent counsel Lawrence E. Walsh, who is running a wide-ranging investigation authorized by a special panel of federal judges. Walsh is expected to take several months to complete his work.