Iran's state-run news agency says the country's foreign ministry has summoned Azerbaijan's ambassador to protest alleged Israeli intelligence activity in the oil-rich Caucasian state.
The Sunday report by IRNA says that the ministry handed a protest note to Azeri envoy Javanshir Akhundov and demanded that his government prevent Mossad from using its territory to launch operations against Iran.
The report said "terrorists" linked to the killings of Iranian nuclear scientists escaped to Israel through Azerbaijan.
Iran has frequently accused Israel of having a hand in the assassination of scientists such as Mostafa Ahmadi Roshan, killed by a bomb in January.
Israel has hinted at covert campaigns against Iran without directly admitting involvement.