One of two car-hailing companies that suspended operations in the United Arab Emirates capital after some drivers were detained has resumed limited service.

Dubai-based Careem says it restarted operations in Abu Dhabi on a "skeleton basis" early Wednesday morning but cautioned customers that supply of cars may be a problem.

Careem and Uber both halted services in Abu Dhabi on Saturday after some limousine drivers were detained in the capital. Local laws require the companies to use cars and drivers from licensed limo companies that have higher fares than regular taxis, rather than use individual drivers.

Uber says its services remain suspended. It says it wants "further clarity on the matter and reassurance that partners will not be at risk and riders will not be inconvenienced while taking a trip."