we begin this hour with tensions ratcheting up between israel and iran. a bomb went off just as israeli tourists boarded a bus in the bulgarian resort city. six people are confirmed dead. some 30 others are wounded. president obama s strongly condemning the attack calling it in his word barbaric. cnn s elise labott is joining us live with the very latest. bulgarians are of course investigating. i m sure the israelis are as well. first of all, what are the bulgarians saying? reporter: well, wolf, forensic investigators on the scene. it s all very preliminary at this point, but they re saying that this was caused by a bus bomb already placed inside the bus. that s really all they know, but they re not ruling anything out. they say it s possibly a terrorist attack. obviously the israelis saying they re sure of it. but bulgarians not ruling anything in, not ruling anything out at this point, wolf. didn t take very long for the prime minister of israel, benjamin netanyahu to d