Some players and staff members of the Senators tweeted photos of an afternoon protest, which they said was peaceful but unnerving.- On mobile? Click here to see Bobby Ryan's tweet.
The protest also happened to take place during the usual time for a game-day nap. That's why Bobby Ryan tweeted about posting a "Do Not Disturb" sign on his window.
On Monday night, a grand jury determined no charges should be laid against a white police officer who shot and killed unarmed 18-year-old Michael Brown in Ferguson, Mo.
It touched off a night of rioting in the St. Louis suburb, as well as protests across the U.S. Officials said 61 people were arrested and about a dozen buildings in Ferguson were set on fire.