The public prosecutor's office in Milan has opened an investigation into claims that Italian citizens travelled to Bosnia-Herzegovina on 'sniper safaris' during the war in the early 1990s.

Italians and others are alleged to have paid large sums to shoot at civilians in the besieged city of Sarajevo.

The Milan complaint was filed by journalist and novelist Ezio Gavazzeni, who describes a 'manhunt' by 'very wealthy people' with a passion for weapons who 'paid to be able to kill defenceless civilians' from Serb positions in the hills around Sarajevo.

Different rates were charged to kill men, women or children, according to some reports.

More than 11,000 people died during the brutal four-year siege of Sarejevo.

Similar allegations about 'human hunters' from abroad have been made several times over the years, but the evidence gathered by Gavazzeni, which includes the testimony of a Bosnian military intelligence officer, is now being examined by Italian counter-terrorism prosecutor Alessandro Gobbis.

The charge is murder.

The Bosnian officer apparently revealed that his Bosnian colleagues found out about the so-called safaris in late 1993 and then passed on the information to Italy's Sismi military intelligence in early 1994.

In February, Gavazzeni handed prosecutors his findings, said to amount to a 17-page file including a report by former Sarajevo mayor Benjamina Karic.

No more 'safari' tours are expected to occur, according to investigators.