Popcaan was reportedly arrested after an on-stage tussle with a police officer.
Apparently, Popcaan was trying to wrestle one of his fans out of the grips of a police officer that was on stage-- as an Instagram clip shows below, Popcaan then pushed the officer and the officer pushed back. The confrontation appears to be very brief, nonetheless, the artist was reportedly arrested and could face assault and battery charges on an officer, as well as resisting arrest. Charges have not been confirmed yet though.
Take a look at footage of altercation in the Instagram videos below, via MissInfo.