Saudi Arabiaand the US have announced a nuclear deal that has rocked the Gulf.

The landmark agreement would establish a civilian nuclear program in Saudi Arabia with the help of US companies.

Critics fear it could lead to Saudi Arabia developing nuclear weapons or even set off a nuclear arms race in the Gulf.

This deal is likely to be a new layer of a deep-seated and bitter rivalry in the Gulf, between Saudi Arabia and the United Arab Emirates (UAE).

The UAE already has a nuclear deal with the US, albeit a less extensive one.

News of this controversial deal follows attacks from Iran on the Gulf in the context of the US-Israeli war on Iran.

This war has transformed the Gulf and sharpened the Saudi-UAE rivalry further.

The countries' leaders Mohammed bin Salman (MbS) of Saudi Arabia and Mohammed bin Zayed (MbZ) of the UAE were once close allies, but their race to dominate the Gulf has soured the relationship.