Westminster terror attack: Fresh arrest made
A man arrested in Birmingham on suspicion of preparation of terrorist acts is the twelfth person to be taken into custody.
Monday 27 March 2017 16:43, UK
Two men remain in custody over the Westminster attack as messaging services such as WhatsApp come under pressure to allow security services to eavesdrop on messages when a warrant is issued.
A 30-year-old man, arrested in Birmingham on Sunday evening on suspicion of preparation of terrorist acts, is the twelfth person to have been arrested since Khalid Masood killed four people and injured more than 50 others last week.
Nine people have been released without charge, while a 32-year-old woman from Manchester has been released on bail.
A 58-year-old man, arrested in Birmingham, remains in police custody after a total of 15 raids across the UK.
Meanwhile, Home Secretary Amber Rudd has criticised messaging services like WhatsApp for potentially allowing terrorists to communicate undetected.
She called for encrypted networks to build "back doors" into their system so terrorists' messages can be accessed during investigations.
It came after it emerged that Masood sent an encrypted message via WhatsApp just minutes before
Speaking to Sophy Ridge On Sunday, Ms Rudd also insisted social media companies must do more to deal with extremist material as part of the drive to combat terrorism.
She is due to meet with internet giants Google, Twitter, and Facebook later this week to discuss the issue, and warned: "They're going to get a lot more than a ticking off."
In response WhatsApp said it had been assisting the police investigation.
A spokeswoman said: "We are horrified at the attack carried out in London earlier this week and are co-operating with law enforcement as they continue their investigations."
On Saturday police said they still believed Masood acted alone but said "there is a possibility we will never understand why he did this".