President Obama says the US has been "left with hard questions" after the shootings of 20 children and 6 adults at a school in Connecticut.

He's visited the scene at Sandy Hook Elementary in Newtown, and told them mass shooting tragedies "must end".

The Sandy Hook community react and tell of the trauma of what happen following the shooting in Sandy Hook Elementary School in Connecticut. 

Flowers are placed directly beside Sandy Hook Elementary School in Connecticut following the shooting in the school.