The investigation, headed by Serbia's special war crimes prosecutor Vladimir Vukcevic, leads to Republika Srpska, but it has come to a halt because of lack of cooperation from some structures in the Bosnian Serb entity, a source for the daily said.
The Serbian government will have to make additional efforts to improve the cooperation, which explains visits by some Serbian ministers to the Bosnian Serb entity, the daily says.
According to the latest reports, Mladic is protected by only a few people, most of whom come from his native town of Kalinovik, and he is being financed by a few business people.
An operation to discover the network of his helpers is under way, the first suspect being Zivadin Mihajlovic, the owner of the Stankom company from Belgrade, who is under investigation on suspicion of providing financial help to Mladic.
The daily claims that the Serbian authorities are checking links between some people from state structures, the Security Information Agency and police and Mladic, and that the replacement of senior officials is expected to follow soon.
Blic quoted Serbian Deputy Prime Minister Ivana Dulic Markovic as saying that the government would not negotiate with Mladic about his surrender. "There is political will and excellent cooperation among security services aimed at arresting Mladic and transferring him to The Hague," she said.