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Thousands of workers in Amazon sites around the world are staging protests about pay and conditions as the online retailer begins its annual sale.
On Monday, Amazon starts offering discounts to its Prime service members.
Unions say that 2,000 workers are on strike in Germany, while in the US, workers in a Minnesota centre reportedly plan a six-hour stoppage. In the UK, week-long protests are planned.
Amazon says it offers great employment opportunities.
William Stolz, a picker at a warehouse in the Shakopee warehouse in Minnesota, told the BBC that workers wanted “safe, reliable jobs” from Amazon.
He says he has to pick an item about every eight seconds, or 332 per hour, for a 10 hour day.
“The speeds that we