Workers at Amazon warehouses and distrbution centres have staged protests - over low pay, poor working conditions and climate concerns - across Europe and the USA to coincide with the online retailer's annual discounted shopping day, Black Friday. Protests have continued to cover Cyber Monday, another crucial sales period for Amazon. 

In recent years Amazon has faced repeated strikes in relation to "exploitative" working conditions, which unions and labour advocates say intensifies during busy sales periods. 

Amazon has denied that its staff are badly treated and has said that it is "a fair and responsible employer". More company comments can be found in the articles below.