A man has been arrested in Lurgan on suspicion of petrol bomb offences.
It is understood the arrest relates to an incident in the Co Armagh town earlier this week.
On Wednesday night, police officers were attacked with petrol bombs while at the scene of a murder in the Victoria Street area.
No one was injured, but additional police support had to be provided as back-up.
The officers were in the area to maintain the integrity of the crime scene while investigations into the death of a 45-year-old man.