Iranian security forces on Thursday announced the arrest of a ring of assassins responsible for the recent killings of nuclear scientists, Iranian media reported. Police also directly tied the suspects to Israel, alleging that they were "hired by an Israeli spy network," according to state news agency IRNA.

Tehran has in the past accused Israel of being behind the killings of several of its nuclear scientists. In January the Islamic state blamed Israel when a nuclear scientist was killed by a bomb placed on his car by a motorcyclist in Tehran.

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