A Serbian accused of killing dozens of innocent people in a brutal Croatian massacre has been discovered to be living in Sydney for 27 years now.

Zoran Tadic, 59, was charged with war crimes by Croatian police for the murder of 43 people, including thirty civilians.

Investigators said Mr Tadic has been living in Sydney since gaining residency in August 1992 with the assistance of Serbian officials, according to the Australian.

The massacre occurred in 1991 in the Croatian village of Skabrnja, according to Croatian police.

Zoran Tadic, 59, (centre) accused of killing dozens of innocent people in a brutal Croatian massacre has been discovered to be living in Sydney for 27 years now

Zoran Tadic (top centre), 59, was charged with war crimes by Croatian police for the murder of 43 people, which comprised of 30 civilians and 13 soldiers

Mr Tadic, then aged 32, is accused of directly being involved in rounding up 30 people, which included 20 men and 10 women aged between 23 and 88.

Mr Tadic and his men, followed by tanks and armed convoys, entered the village at around 7.30 am in November 1991, where investigators say they 'broke the resistance of the defenders and then mass destroyed residential, commercial and sanctuary facilities'.

Police said these people were killed with shots to the head, neck and chest and were physically abused prior to their deaths.

Soldiers who defended the Croatian village had their ears hacked off as a form of torture.

The killings are commemorated in a state ceremony every year.

Croatian police have filed an official charge request against Mr Tadic to the State Attorney in Split, Croatia.

Investigators from the War Crimes Unit in Zadar said they have officially charged Mr Tadic with war crimes under the Geneva Convention including criminal offences against civilians and crimes against prisoners of war.

Investigators said they have officially charged Mr Tadic with war crimes under the Geneva Convention including criminal offences against civilians and crimes against prisoners of war

After the massacre, investigators said Mr Tadic was promoted to Chief of State Security of the Benkovac Territorial Defense and was also given housing in Benkovac, Croatia, before eventually moving to Australia.

Police have yet to request assistance for Mr Tadic's arrest.

'It is still too early to talk about extradition request, or Mr Tadic’s exact whereabouts,' Croatian police spokesperson Ivana Grbin said.