High Representative for Bosnia and Herzegovina Christian Schmidt sent a report to the U.N. Security Council this week warning of Bosnian Serb separatism.
Mladic, who was known as the "Butcher of Bosnia" while a military general, is the final major official from the war to be brought to justice. Mladic directed soldiers to commit brutal acts such as ethnic cleansing and more than 100,000 died during the war as a result.
Regional and international far-right groups see the region and Bosnia and Herzegovina as a possible breeding ground for white supremacist ideologies.
Momcilo Krajisnik, a Bosnian Serb former wartime official, was taken to a hospital last month after developing pneumonia.
Lovren grew up in Germany, having fled the Bosnian War.
Some 120,000 landmines remain in Bosnia following a three-year civil war.
No one who witnessed the war in Bosnia came out of it unaffected.
Radovan Karadzic was found guilty of 10 of 11 counts of war crimes and sentenced to 40 years imprisonment.
A photojournalist reflects on Bosnia 20 years after the end of the Bosnian War.
The move threatened the integrity of the country, 20 years after it emerged from war.
One of Europe's 'children of hate', Alen Muhic searches for his Bosnian mother and the Serbian soldier who raped her.