Tensions have spiked between the two arch-rivals for predominance in the Middle East, since Riyadh accused the Islamic Republic of carrying out attacks that damaged six oil tankers in the Gulf, which Tehran denied

Revamped battle orders call for high-intensity campaign, with plans to inflict damage to civilian infrastructure and target members of Palestinian groups

Writing 'The wicked man shall die in his iniquity' was sprayed on Amnesty International and ASSAF buildings, while a dead mouse in a box was left outside a preschool for refugee children

The Treasury Department said it was imposing sanctions on Zarif for acting on behalf of Iranian Supreme Leader Ayatollah Ali Khamenei