The octogenarian former truck driver from the Friuli-Venezia Giulia region of northeast Italy, is suspected by Milan prosecutors of "voluntary homicide aggravated by abject motives", according to Italian news agency ANSA.

Lawyer Giovanni Menegon told journalists that his client had answered questions from prosecutors and police and "reaffirmed his complete innocence".

Milan prosecutors did not respond to AFP requests for comment.

In October, prosecutors opened an investigation into what Italian media dubbed "weekend snipers" or "war tourists": mostly wealthy, gun-loving, far-right sympathisers who allegedly gathered in Trieste and were taken to the hills surrounding Sarajevo where they fired on civilians for sport.

During the nearly four-year siege of Sarajevo that began in April 1992 some 11,541 men, women and children were killed and more than 50,000 people wounded by Bosnian Serb forces, according to official figures.

Il Giornale newspaper reported last year that the would-be snipers paid Bosnian Serb forces up to the equivalent of 100,000 euros ($115,000) per day to shoot at civilians below them.

The suspect -- described by the Italian press as a hunting enthusiast who is nostalgic for Fascism -- is said to have boasted publicly about having gone "man hunting".

Witness statements, particularly from residents of his village, helped investigators to track the suspect, freelance journalist Marianna Maiorino told AFP.

- In Bosnia 'for work' -

"According to the testimonies, he would tell his friends at the village bar about what he did during the war in the Balkans," said Maiorino, who researched the allegations and was herself questioned as part of the investigation.

The suspect is "described as a sniper, someone who enjoyed going to Sarajevo to kill people," she added.

The suspect told local newspaper Messaggero Veneto Sunday he had been to Bosnia during the war, but "for work, not for hunting". He added that his public statements had been exaggerated and he was "not worried".

The investigation opened last year followed a complaint filed by Italian journalist and writer Ezio Gavanezzi, based on allegations revealed in the documentary "Sarajevo Safari" by Slovenian director Miran Zupanic in 2022.

Gavanezzi was contacted in August 2025 by the former mayor of Sarajevo, Benjamina Karic, who filed a complaint in Bosnia in 2022 after the same documentary was broadcast.

The Bosnia and Herzegovina prosecutor's office confirmed to AFP on Friday that a special war crimes department was investigating alleged foreign snipers during the siege of Sarajevo.

Bosnian prosecutors requested information from Italian counterparts at the end of last year, while also contacting the International Residual Mechanism for Criminal Tribunals in The Hague, it said. That body performs some of the functions previously carried out by the International Criminal Tribunal for the former Yugoslavia.

Sarajevo City Council adopted a decision last month authorising the current mayor, Samir Avdic, to "join the criminal proceedings" before the Italian courts in order to support Italian prosecutors.