The PSNI is investigating a riot during which officers were attacked by a crowd in Lisburn overnight.
The incident happened in the Glebewalk area shortly before 1am this morning.
Up to 20 people were involved in the attack, during which a can of tear gas was stolen from police.
One person was taken to hospital with injuries but they are not thought to be life- threatening.
Two people were arrested in connection with the riot and one was later charged with assaulting police officers.