The searches come after tens of thousands of Navalny's supporters took to the streets.
"It is clear that there are still too many people coming in and out of our country each day."
Here's the latest.
"It is deeply disappointing and frustrating."
Dutch police detained more than 180 people on Monday night
Navalny was poisoned by state security agents in August.
The enforced quarantine comes in addition to fines as high as $42,200.
Italy has threatened legal action against the vaccine company.
The UK is currently under a lockdown, with bars and restaurants closed, only essential shops open, and restrictions on people's activities.
Here are the latest developments.
He accuses Putin of ordering his poisoning with the deadly nerve agent Novichok.
Public records showed 796 children had died at the care home.
The extraordinary snub to Washington came days after the storming of the US Capitol.
More than half a million birds are set to be slaughtered in France.
Mike Pompeo has called for Zhang's immediate and unconditional release after reports the woman was subjected to torture.
The Government is being urged to fight new quotas for local exporters as part of the new European trade deal.
No further positive cases linked to the visitor have been detected so far.
The Hungarian rollout comes a day before France, Germany, Italy, Austria, Portugal and Spain plan to begin mass vaccinations.