An Italian prosecutor returned from Turkey yesterday and said he was "cautiously optimistic" about the chances of interrogating an arrested Turk, Bekir Celenk, about the plot to kill Pope John Paul II.

Prosecutor Antonio Marini said Turkish authorities had outlined procedures for getting Celenk to the trial in Rome, where he and six others are accused of aiding Mehmet Ali Agca's attack on the pope on May 13, 1981, Reuter reported. Agca, jailed for life for wounding the pope, says Celenk financed the alleged conspiracy on behalf of Soviet and Bulgarian diplomats.

Turkish law forbids extradition of its nationals to face charges abroad, but Italian officials are basing a request for his presence on an antiterrorism convention ratified by Turkey. AROUND THE WORLD Italian Prosecutor Hopeful Of Testimony by Celenk

ROME -- An Italian prosecutor returned from Turkey yesterday and said he was "cautiously optimistic" about the chances of interrogating an arrested Turk, Bekir Celenk, about the plot to kill Pope John Paul II.

Prosecutor Antonio Marini said Turkish authorities had outlined procedures for getting Celenk to the trial in Rome, where he and six others are accused of aiding Mehmet Ali Agca's attack on the pope on May 13, 1981, Reuter reported. Agca, jailed for life for wounding the pope, says Celenk financed the alleged conspiracy on behalf of Soviet and Bulgarian diplomats.

Turkish law forbids extradition of its nationals to face charges abroad, but Italian officials are basing a request for his presence on an antiterrorism convention ratified by Turkey.