The Saudi-led coalition said earlier on Friday it intercepted and destroyed four explosive-laden drones launched by the group in direction of Saudi Arabia.
Prayers were also allowed to resume in mosques in the holy city of Mecca, state media reported, just weeks before the annual hajj pilgrimage is due to start.
Investigators suspect the French of having paid some 327 million euros in bribes to facilitate the deals, triggering some 13 million euros in kickbacks.
US shale oil output was hit hard by the price war and the slump in crude demand worldwide, with estimates suggesting a loss of around 1.3-1.5 million bpd in production.
The measures include a curfew running from 3 pm to 6 am, a suspension of prayers in mosques and a stay-at-home order for public and private sector workers in the Red Sea city whose airport serves pilgrims.
The pandemic has hammered Saudi Arabia’s nascent non-religious tourism industry - among the few new sectors to have emerged under Crown Prince Mohammed bin Salman’s drive to diversify the economy from oil and create millions of jobs.