Israeli Defence Minister Ehud Barak said the Tehran-backed Lebanese Shi'ite Muslim group Hezbollah was responsible for yesterday's bus bombing in Bulgaria.
The apparent suicide attack killed eight people and injured dozens in a bus transporting Israeli tourists at Burgas Airport.
Israeli Prime Minister Benjamin Netanyahu yesterday said Iran was behind the attack in the aftermath of the late afternoon blast.
There was no immediate Iranian reaction to the Israeli accusations.
The leader of the Lebanese political party Hezbollah Sayyed Hasan Nazrallah has spoken out against the reported kidnapping of at least 13 Shi'ite pilgrims in Syria.
He told the Lebanese people who have taken to the streets of Beruit in protest to go home.
He said the crisis would not be solved by burning tyres and blocking roads, and that it might be used as a pretext by others to escalate matters.
In other words, he's trying to take some heat out of the situation.