Norway will remove the AstraZeneca Plc shots from its Covid-19 inoculation program due to the risk of rare blood clots, Bloomberg reported.

“The government has decided that the AstraZeneca vaccine will not be used in Norway, not even voluntarily,” Prime Minister Erna Solberg said at a news conference on Wednesday.

Johnson & Johnson’s vaccine will remain on hold and may be offered on a voluntary basis, the premier told reporters.

The government also decided to start vaccinating younger adults sooner and is considering redistributing more doses to the municipalities with the highest level of infection.

Norway initially put Astra on hold on March 11, after reports of blood clots across a number of countries. Norwegian health authorities then embarked on their own investigation following a spate of local deaths tied to the vaccine. A separate Norwegian study has since found that the blood clots stemmed from a syndrome induced by the Astra vaccine.

Norway has said that dropping Astra, which was expected to make up about a fifth of the doses in its immunization program, would not present a significant hurdle.