Tehran accused Saudi Arabia and Israel of coordinating actions to damage the Islamic Republic, in the latest tit-for-tat between the rival nations.
The four-day International Defence Exhibition and Conference (IDEX) kicked off Sunday in Abu Dhabi with the United Arab Emirates announcing 21 deals worth more than $1.2 billion.
Washington is pushing for a new military coalition of Sunni Arab nations, involving intelligence sharing with Israel, in a move against the growing regional presence of Iran.
An Emirati soldier has been killed while taking part in a Saudi-led operation in war-torn Yemen, state media reported.
An Emirati ambassador to Afghanistan has died from wounds sustained in a bombing in Kandahar last month, which left five other UAE officials dead.
The United Arab Emirates has locked its focus on Mars, it seems, as the Gulf State's rulers confirm a 100-year national plan to build the first city on Mars.
President Abedrabbo Mansour Hadi's forces clashed with UAE-backed factions on Sunday, in bloody fighting that revealed deepening differences within Yemen's pro-coalition ranks.
Somalia's breakaway northern territory of Somaliland has said the United Arab Emirates can establish a military base in its territory.
Morocco's religious authorities have ruled that people who leave Islam should not be punished with the death penalty, reversing its previous ruling on apostasy.
In-depth: Trump's ambitious plan to make American aviation great again may be bad news for Gulf-based carriers, which have expanded their popular US routes dramatically over the past few years.