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.
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Babies as young as four-months-old have been targeted in these horrific attacks.
Authorities announced that 29-year-old Travis Reinking was taken into custody on Monday.
Police say a van in Toronto has struck at least 8 people, but the cause of the incident and the extent of injuries are not yet known.