Twitter has reinstated a suspended account that publicised leaked personal data belonging to Democrat politicians. On Friday, the hacker known as "Guccifer 2.0" released contact details of 193 current and ex-Congress members.

A French security researcher says he managed to turn the tables on a cyber-scammer by sending him malware. Technical support scams try to convince people to buy expensive software to fix imaginary problems.

Apple has rejected accusations from Russia's state competition watchdog that it fixed iPhone prices.

UK-based drug dealers earn more money online than any of their European rivals, research suggests.