So this does in fact refer to the Srebrenica massacre, and not an event in Sarajevo.
Actually, in two separate judgments the Supreme Court of the Netherlands upheld a 2011 decision by the The Hague Appeals court.
The court ruled that the state is responsible for the deaths of three Bosnian Muslims who were murdered shortly after being forced to leave a UN designated "safe area" controlled by the Dutch Battalion (Dutchbat), during the Srebrenica massacre.
I think the verdict is unfair. The Dutch troops had no heavy weapons, they were not directly supported by other UN troops, and the rules of engagement did not allow them to fire on the Serbians unless and until the Serbians fired on them. The onus of this disaster lies with the UN command.
The court found that Dutchbat's conduct could be attributed to the state based on two sets of rules established by the UN International Law Commission. Further, the court found that Dutchbat acted wrongfully in turning away the refugees because it had jurisdiction to comply with the human rights enshrined in the European Convention on Human Rights and International Covenant on Civil and Political Rights.