Bulgaria's Chief Prosecutor Sotir Tsatsarov has admitted the line between anti-terror measures and violation of human rights is "thin".

Tsatsarov, however, was warned a fresh anti-terror bill should not be dismissed and should not be viewed in Parliament along "government and opposition" lines.

He has made his comments at an national conference dedicated to radical Islamism and threats it poses to the security of Bulgaria.

The proposed anti-terror legislation has sparked controversy, awarding sweeping powers to the military and police in cases of a possible terror emergency.

Some experts, opposition members, and civil society representatives have warned against infringing on human rights, which in their words could be the case if the bill comes into effect.

Tsatsarov, quoted by the Bulgarian National Radio, has also opined that Bulgaria needs a clear definition of what radical Islam is.

The country recently adopted on first reading draft changes the Criminal Code under which the preaching of radical Islam should be punishable by imprisonment or a fine.

The amendments also put the preaching radical Islam on equal footing with that of fascism.

While the draft itself contains a definition, the final version should make clear no sign of equality is put between radicalism and Islam in general.