( CNN ) -- Wednesday 's explosion on a bus carrying Israeli tourists in Bulgaria came on the 18th anniversary of the attack on a Jewish community center in the Argentinian capital of Buenos Aires , in which 85 people were killed . Argentina 's top prosecutor last year blamed Iran for the 1994 attack . Israel also holds Iran responsible for the attack . Tehran has denied any connection to the Buenos Aires bombing , which it has condemned . Such claims and counterclaims between Israel and Iran have been common in the past three decades , with each blaming the other for attacks on their citizens . Israel , without citing evidence , quickly pointed to Iran in the Bulgarian incident . `` All signs point towards Iran , '' Israel Prime Minister Benjamin Netanyahu said . `` Over the last few months we have seen Iran 's attempts to attack Israelis in Thailand , India , Georgia , Kenya , Cyprus and other countries . '' Read Netanyahu 's official statement . At least seven people were killed in the Bulgarian explosion . Iran had no immediate reaction . After Iranian nuclear scientists were assassinated in Tehran , Iran blamed Israel . When attackers targeted Israeli diplomats this year , Israel blamed Iran . Iran hanged a man who was convicted of killing one of its nuclear scientists , state-run Press TV reported in May . Majid Jamali Fashi was convicted of the January 2010 killing of Massoud Ali Mohammadi , an Iranian university professor and a nuclear scientist . He was also convicted of spying . Prosecutors accused him of working for the Mossad , the Israeli spy agency , and said he was paid $ 120,000 by Israel to carry out the hit . Israel typically does not comment on such claims . In January , Iran sent a letter to the United Nations secretary-general alleging the killings of the scientists were terrorist attacks that followed a clear pattern . `` There is firm evidence that certain foreign quarters are behind such assassinations , '' the letter said . In April , Iran said it broke up an Israeli `` terror and sabotage network '' that was planning attacks within the country , making a number of arrests while confiscating weapons and equipment , state-run media reported . `` The complicated and months-long measures and moves made by the Iranian intelligence forces to identify the devils led to the discovery of the Zionists ' regional command center ... and discovering the identity of the agents active in that command center , '' a statement from the Iranian Intelligence Ministry said . Previously on CNN.com : Iranian supreme leader blames U.S. , Israel for scientist 's death . A spokesman for the Israeli Foreign Ministry said then that every few months Iran spreads disinformation and there was no basis to the story . Ties between Iran and Israel unraveled after the 1979 Islamic revolution in Iran . After he was elected in 2005 , Iranian President Mahmoud Ahmadinejad began spouting anti-Israeli and anti-Western rhetoric . Yet it has been Iran 's nuclear program that has raised the prospects of armed conflict . Iran has been in a protracted dispute with the United States and other countries over its nuclear program , which it claims is for peaceful purposes . But many Western countries fear the program is a cover for Iran to develop nuclear weapons . Just this week , U.S. Secretary of State Hillary Clinton said Iran has not made a `` strategic decision '' to address concerns . Clinton : Iran 's proposals are `` non-starters . '' Israel , which is believed to have its own nuclear arsenal and is alarmed over Tehran 's hostility toward the Jewish state , has said it may attack Iran to try to stop the country from developing nuclear weapons . `` There is a world agreement that the Iranian government is after nuclear weapons and that its policy of terrorism is endangering everybody . There is a global understating that we must do everything we can to prevent Iran from endangering others , '' Israeli President Shimon Peres said , according to the Israeli Foreign Minister 's office . Opinion : Does U.S. matter in Egypt and Israel ? CNN 's Joe Sterling contributed to this report .
Israel claims Iran is behind explosion on Bulgarian bus . It also has blamed Tehran for attacks on diplomats . Score: 6