A cyber-attack against Bitstamp, one of the biggest bitcoin exchanges in the world, resulted in the loss of almost 19,000 BTC the equivalent of more than $5 million. The attackers are most likely trying to move those bitcoins around as many addresses as possible, and then will proceed to launder the stolen coins by using so-called mixing services. Bitstamps is assuring their customers that all of their bitcoins remain safe. The company states that this breach represents a small fraction of BitStamps total bitcoin reserves”]
Source: https://securelist.com/bitcoin-value-plunges-following-5m-bitstamp-heist/68308/