Azerbaijan has arrested two men suspected of plotting to attack prominent foreigners in the former Soviet republic.
It is alleged they were aided by a third individual, an Iranian who had links with Iran’s intelligence.
It is reported he helped smuggle in weapons including sniper rifles, handguns and explosive devices.
Azerbaijan’s National Security Ministry said the men’s targets included Israel’s ambassador.
The US had already warned its citizens after several websites in Azerbaijan were attacked by hackers last month who left various threats.
Although Azerbaijan is a secular Muslim country its home to 9,000 Jews and has friendly ties with Israel and America.
In the past the Azeri authorities say they’ve prevented car bomb attacks near the Israeli, US and British embassies – all allegedly involving agents from neighbouring Iran.