Bulgaria’s new foreign minister said Wednesday its evidence that Hezbollah was behind a bomb attack last July on its soil was "circumstantial" and "not categorical" at this stage.

Bulgaria's new foreign minister said Wednesday its evidence that Hezbollah was behind a bomb attack last July on its soil was "circumstantial" and "not categorical" at this stage.

The minister, Kristian Vigenin, said that as a result, Sofia would not back the European Union labeling the Lebanese organization's military wing a "terrorist" entity without proof from other cases.

"For us it is important that this case is not based only and solely on what happened in Burgas as, in my opinion, the evidence is not categorical," Vigenin told state BNR radio Wednesday.

"We cannot take hard decisions with consequences for the politics of the European Union in the region based only on circumstantial evidence," he added.

The July 18 attack saw a lone bomber blow himself up near a bus of Zionist tourists at Bulgaria's Black Sea airport of Burgas, killing five of them, their Bulgarian bus driver and himself.