Mikel Arteta became the first Premier League manager to be tested positive for COVID-19.
Arsenal have closed their training ground and club staff who had recent contact with Arteta is now in self-isolation.
Arsenal match against Brighton has been called off.
“This is really disappointing,” said Arteta.
“I took the test after feeling poorly. I will be at work as soon as I’m allowed.”
Since Arteta meet most of the key personnel in Arsenal and that includes first team squad.
“The health of our people and the wider public is our priority and that is where our focus is,” said Arsenal managing director Vinai Venkatesham.
“We are in active dialogue with all the relevant people to manage this situation appropriately, and we look forward to getting back to training and playing as soon as medical advice allows.”
Two days ago, Arsenal’s Premier League match with Manchester City on Wednesday was postponed as a precautionary measure.
Several players went into self-isolation after Olympiakos owner Evangelos Marinakis contracted coronavirus after meeting a number of players when Arsenal play Olumpiakos two weeks ago.
The Premier League will hold “an emergency club meeting” on Friday to discuss future fixtures.