During the brief time that the Senate was in lockdown during an incident which saw shots fired, security used the new Twitter Alert to make sure those inside the building had the most recent and reliable information:
The new system was unveiled by Twitter last week as a more effective way to highlight critical information for users.
More top news
A mother feared to have been planning to travel to Syria with her four children has been charged with child abduction.
Dimitri Diatchenko was sentenced to 60 days community service after eating the animal and sending his ex graphic photos of what he did.
The starving toddler has been taken into care following the incident in Chile - but it is thought the dog may well have saved his life.