Up to eight petrol bombs were thrown during a disturbance in the Garvaghy Road area of Portadown on Monday night.
Trouble erupted between groups of youths, police said, at around 10.30pm.
Police said between three and four bins were set on fire during the disturbance.
A police spokesman said: “For public safety reasons the road was closed for a short period, while clergy and members of the local community assisted police in resolving the situation quickly.”
Police have appealed for anyone with information about the trouble to contact investigating officers.