DUBAI: Iran has written to the UN nuclear watchdog to complain about Israeli threats to strike its atomic energy sites, its foreign ministry spokesman said Monday. Israel has vowed to attack Iran in retaliation for a volley of Iranian missiles on October 1, stirring speculation that Iranian nuclear sites could be among the targets. “Threats to attack nuclear sites are against UN resolutions….and are condemned … We have sent a letter about it to … UN nuclear watchdog,” the spokesperson said.