Two Serbian secret service officials were arrested over killing of independent Serb journalist and publisher nearly 15 years ago during the hardline rule of former President Slobodan Milosevic.
The Cabinet of Prime Minister Ivica Dacic was approved with 142 votes for and 72 against in a 250-member Assembly.
A presidential runoff is expected on May 20, as both Tadic and Nikolic are unlikely to get more than 50 percent of the first round vote.
Ratko Mladic says all Serbs should share the blame as they supported Prez.
Day in Pics: 30th September
Showbiz World - September 30, 2014
George Clooney - Amal Alamuddin grand Venice wedding