Petrol bombs, bricks and bottles were thrown at police during sustained rioting in the Sandy Row area of Belfast on Friday night.
The Police Service of Northern Ireland (PSNI) said eight officers were injured and seven people arrested.
Bradbury Place/Sandy Row near the centre of Belfast last night. pic.twitter.com/ruXbIP1erR— Mark Simpson (@BBCMarkSimpson) April 3, 2021
Up to 100 people had gathered in the Shaftesbury Square area where a loyalist protest had been expected.
Trouble began before 8.00pm, when fireworks and other missiles were thrown at police.
Speaking on Friday night, Belfast's PSNI District Commander, Ch Supt Simon Walls, called for calm after a "small local protest developed into an attack on police".
He said objects that had been thrown at officers included "heavy masonry, metal rods, fireworks and manhole covers".
Ch Supt Walls said the eight injured officers had sustained "burns, head and leg injuries".