A British computer hacker was arrested on charges stemming from launching thousands of cyber-attacks against firms, including Pokemon, Google and Skype.
A 17-year-old boy has pleaded guilty to hacking offences which are linked to the data breach at the telecoms company TalkTalk in October 2015.
City of London Police arrested a woman who works for Sage on suspicion of conspiracy to defraud. The arrest occurred at Heathrow Airport.
A 40-year-old Nigerian national and alleged online scam artist, accused of bilking his victims out of more than $US60 million (£45m), was arrested in Port Harcourt, Nigeria in a joint operation.
Five men were arrested by Kripos, Norway's national criminal justice investigation service, for using and selling malware, in particular a remote access trojan (RAT).