UK terrorism
The New Zealand prime minister said she was "absolutely gutted" to hear of the stabbings.
Weeks before the 20th anniversary of 9/11, ex-President Donald Trump said the terrorist behind the 2001 attacks wasn't as bad as the "monsters" he took out.
Sahayb Abu of Dagenham prepared to strike last summer but was arrested after discussing guns with an undercover police officer.
It took a long time for me to accept that I cannot change what happened. Now I'm using my experience to help counter extremism and support others affected by terrorism.
A bizarre pre-recorded message gave warning of the blast.
The 18-year-old published vitriolic graphics encouraging terrorism and signposted people to violent terrorist guidebooks online.
We are moving towards an extremism of thought that historically has often ended in bloodshed, writes an anonymous survivor.
The 23-year-old was found guilty of 22 counts of murder in March – just days before trials were halted due to lockdown.
Several people were injured in the incident in the German capital.
A 25-year-old man has been charged with three counts of murder and three counts of attempted murder.