Detectives investigating an attack on a mosque in Greenwell Street in Newtownards have arrested a second man.
The incident took place in the early hours Saturday 10 August.
A man, aged 46, was arrested on Tuesday on suspicion of a number of offences, including attempted arson with intent to endanger life, making a petrol bomb and criminal damage.
He has since been released on police bail.
A 42-year-old man arrested on Sunday, 11 August, was also released on police bail to allow for further enquiries.
Enquiries are continuing and anyone with any information or footage that could assist the investigation is asked to contact police on 101 quoting reference 53 of 10/08/24.
Alternatively, information can also be provided to the independent charity Crimestoppers on 0800 555 111 which is 100% anonymous and gives people the power to speak up and stop crime.