After the blast in Bulgaria, both Iran and Hezbollah denied involvement almost as quickly as Prime Minister Benjamin Netanyahu of Israel pointed the finger at them. American and Bulgarian officials backed the assessment off the record, but would not say so openly. There has been little hard evidence presented to show how or by whom the plots were coordinated.
Israeli intelligence has evidence of many telephone calls between Lebanon and Burgas in the two months before the bombing, according to a senior government official who spoke on the condition of anonymity because the information is classified, with the volume intensifying in the three days leading up to it.
But they are no more prepared to expose the details of their counterintelligence work publicly than the attackers are to claim responsibility. “We know the sources in Lebanon,” though not the identity of those on the other end in Bulgaria, the official said. “They shouldn’t know that we know the numbers in Lebanon.”