BERLIN (AP) — German health officials have agreed to restrict the use of AstraZeneca’s coronavirus vaccine in people under 60, amid fresh concern over unusual blood clots reported from those who received the shots.

Health Minister Jens Spahn and state officials agreed unanimously Tuesday to only give the vaccine to people aged 60 or older, unless they belong to a high-risk category for serious illness from COVID-19 and have agreed with their doctor to take the vaccine despite the small risk of a serious side-effect.

The move follows the recommendations of Germany’s independent vaccine expert panel and comes after the country’s medical regulator released new data showing that a total of 31 unusual blood clots, including nine deaths, were reported by March 29 out of some 2.7 million doses of AstraZeneca administered in Germany.