Thousands of Amazon workers around the world began striking on Black Friday in order to receive improved pay and working conditions.

Organized by UNI Global Union and Progressive International, the demonstrations aim to hold Amazon accountable for alleged labor abuses, environmental harm, and anti-union practices. Workers in major cities across the U.S., Europe, and Asia will join protests supported by unions and advocacy groups.

Amazon workers on six continents planned strikes and protests lasting through Cyber Monday. Strikes were expected in more than 20 countries including the U.S., Germany, India and Japan.