Twitter has sent warnings to a number of users that their accounts may have been hacked by "state-sponsored actors".

The UK's health service is working with Tinder to persuade more young people to donate organs after death.

Thousands of business and personal websites are taken offline by web host Moonfruit after it was threatened with a cyber-attack.

Ransomware is becoming the fastest growing form of computer malware, experts warn.

There is a new X Prize that challenges teams to map a 4km-deep, 500-sq-km area of sea floor using autonomous robots.