Hezbollah has dismissed Bulgaria's accusation that it had carried out a bomb attack that killed five Israelis last year.
It said it was part of an Israeli smear campaign.
Deputy Hezbollah leader Naim Qassem said the accusation was part of "allegations and incitements and accusations against Hezbollah" pursued by Israel after it had failed to defeat Hezbollah militarily.
"All these accusations against Hezbollah will have no effect, and do not change the facts," Mr Qassem said.
"We will not submit to these pressures and we will not change our priorities. Our compass will remain directed towards Israel."