You don’t even have to read the article. OP put it right there in the post.

the medical aid group had been removed from a register of foreign nongovernmental organizations.

Russia was getting ready to outlaw them. It would have been a danger for them to keep personnel in the country, leaving them exposed to being kidnapped and used as currency for prisoner exchanges.

There’s a chance you’re joking but I know for a fact there are people here who will take this seriously.