"Employees logistics centres for Amazon in Germany and Spain staged strikes in Friday, ending work in the "black Friday", which traditionally marks the beginning of the season of Christmas discounts", - stated in the message.
Unions in Britain said they would stage protests at five sites to complain about safety conditions.
But the majority of employees were continuing to work and there was no impact on customer orders.
Workers at Amazon's biggest warehouse in Spain, San Fernando de Henares, walked off the job on Friday and will also strike on Saturday.
A striking worker stands outside the entrance of an Amazon fulfillment centre in San Fernando de Henares, Spain, on November 23, 2018. But Amazon said its European fulfillment network is fully operational and reports to the contrary are "simply wrong".
Meanwhile in France, a group of activists dumped old electronic devices in front of Amazon´s French headquarters to protest to what they said was the online retailer´s lack of recycling measures, as well as overconsumption encouraged by Black Friday sales.
Their demands? Better pay and working conditions, Yahoo! They are breaking bones, being knocked unconscious and being taken away in ambulances.
He added: "We're standing up and saying enough is enough". To get the CEO to understand they released a video telling him "we are not robots" in 5 langauges. The UK protests were dubbed "Amazon, we're not robots".
In a statement, Amazon pushed back at the union complaints. These are people making Amazon its money. Black Friday deals are expected to produce an additional $2 billion of revenue for retailers in Europe, some analysts say. "That's what we're campaigning for".
Amazon warehouse workers in Germany and Spain are planning to strike for at least, Reuters reports. The company tried to address the criticism in October by announcing all USA warehouse workers would be paid at least $15 an hour, though the company also eliminated some employee stock awards and bonuses.
"We are entering the end of year spurt, the most stressful time for employees", said Verdi representative Mechthild Middeke. It cited data from the UK's Health and Safety Executive stating it "has over 40% fewer injuries on average than other transportation and warehousing companies in the United Kingdom".
In its statement, though, Amazon said employees had "a competitive salary, complete package of benefits and innovative training programmes".
Whether or not these bold moves will pay off remains to be seen.