Macedonia's army chief of staff faces an inquiry into allegations that he committed atrocities in the eastern Croatian town of Vukovar in 1991.
Stojanovski was in the Yugoslav army at the time of the siege
Croatian police have been told to look into Miroslav Stojanovski's role in the three-month assault on the town.
Croatian media this week accused the general of heading a unit that captured about a dozen Croatian soldiers who were never seen again alive.
More than 1,000 civilians died during the siege and bombardment of Vukovar.
Macedonia's Defence Minister Jovan Manastijevski has rejected the claims against his chief of staff.
Vukovar prosecutor Bozidar Piljic ordered police to investigate Gen Stojanovski, who media reports said was an officer in the Serb-dominated Yugoslav army at the time.
Three former Yugoslav army officers are already charged with having committed crimes in Vukovar.