Rostransnadzor has ordered all Russian airlines to suspend flights on An-148 aircraft, Interfax-Tourism reports.

“We have issued an order to suspend An-148 flights for all airlines that operate them,” said the head of the department, Viktor Basargin explained that the decision was made following an unscheduled inspection of Saratov Airlines.
Rosaviatsiya told Interfax that following an inspection of Saratov Airlines, the agency had restricted the company's air operator certificate until April 27.
Besides Saratov Airlines, the Russian operators of the An-148 include Angara Airlines and the Rossiya Special Flight Squadron.
Source: trn-news.ru