Police in riot gear, supported by an armoured SWAT vehicle and a helicopter overhead, repeatedly ordered a crowd to disperse in Ferguson, Missouri.
They then fired a volley of tear gas just after 11pm (5am UK time), sending the crowd fleeing, it was reported.
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Yorkshire Water says the tap water in Thorne, near Doncaster, is still not fit to drink after a contamination scare.
In December 2012, gunman Adam Lanza shot dead 20 children and six teachers in the Connecticut school, before turning the gun on himself.
The study, conducted by the European Banking Authority, looked at how much capital would be used up in adverse economic conditions.