Terrorists

WhatsApp must not be 'place for terrorists to hide'

Khalid Masood killed four people in Westminster this week. It is understood his phone had connected to messaging app WhatsApp two minutes earlier.

Amber Rudd said she would be meeting technology firms this week.

A WhatsApp spokeswoman said the company was "horrified at the attack" and was co-operating with the investigation.

Meanwhile, a 12th arrest has been made by officers investigating the attack. The 30-year-man was detained in Birmingham on Sunday on suspicion of preparing terrorist acts.

Facebook algorithms 'will identify terrorists'

In a letter describing the plan, he said algorithms would eventually be able to spot terrorism, violence, bullying and even prevent suicide.

He admitted Facebook had previously made mistakes in the content it had removed from the website.

But he said it would take years for the necessary algorithms to be developed.