Two men arrested on Monday by police investigating serious disorder in Larne on March 30 have been released unconditionally.
The pair, aged 31 and 36, had been detained for questioning over the attack on several houses and police by a mob of up to 100 men.
Police said the south east Antrim brigade of the UDA were responsible.
A number of homes in the Ferris Avenue and Knockdhu Park areas were attacked during the incident.
One police officer was treated in hospital.