The prosecutor general said Monday he had ordered defeated presidential candidate Stanislaw Tyminski not to leave Poland until he had been interrogated on suspicion of slandering Prime Minister Ta-deusz Mazowiecki.

A statement by the prosecutor's office said the Toronto-based businessman had been summoned for interrogation under article 270 of the criminal code, which provides jail sentences for those who "demean the top state authorities."The prosecutor announced last month that Tyminski was being investigated for possible criminal slander after he accused Mazowiecki of betraying the nation by selling off Polish companies to foreigners at bargain-basement prices.