Justin Bieber has reportedly flown to Panama after pictures appearing to show him on a beach were widely published.
It follows the US singer's arrest in Miami on suspicion of driving under the influence of drink or drugs and resisting arrest.
He was released from police custody on Thursday.
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The violence began after a counter-protester allegedly doused a female rally organiser with pepper spray.
As temperatures climb through the day, the warmest spots are likely to be across western parts of Northern Ireland and western Scotland.
Boris Johnson and Amber Rudd have both criticised social media giants for failing to detect and remove extremist material online.