SOFIA, Bulgaria - Israel is vowing to strike back at Iran for a brazen daylight bombing Wednesday that killed at least seven people on a bus full of Israeli tourists in Bulgaria.
The bombing was the latest in a series of attacks attributed to Iran that have targeted Israelis and Jews overseas. Iran has denied involvement in the past but has not commented on Wednesday's attack.
President Barack Obama termed it a "barbaric terrorist attack" and called Israeli Prime Minister Benjamin Netanyahu to pledge U.S. help in finding the perpetrators.
The blast gutted the bus at the airport in the quiet Black Sea resort city of Burgas, some 250 miles east of the capital, Sofia, where the Israelis had just arrived on a charter flight from Tel Aviv carrying 154 people, including eight children.
The resort town has become a popular travel destination in recent years for Israelis, particularly for recent high school graduates before they are drafted for mandatory military service.
No group immediately claimed responsibility for the attack, which wounded 30 others.
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