The Spanish region of Castile and León is suspending the use of the AstraZeneca vaccine.
The local authorities have decided because of concerns about blood clots and a reduced platelet count in vaccines.
Castile and León, which has about 2.4 million inhabitants, wants to wait for the European Medicines Agency (EMA) to issue a report on the vaccine’s safety.
Due to concerns about potential side effects, AstraZeneca vaccinations were temporarily halted across Spain and many other European countries last month.
The vaccinations were resumed after a short time after the EMA again ruled that the drug was safe and effective.