An Audi linked to the fatal shooting of a man outside an Oxley home earlier this week has been torched overnight.

Emergency services were called to a unit complex in Dutton Park around 11pm, where fire had torn through several cars in a carport.

Early investigations suggested the 2016 Audi A3 was deliberately set alight and the blaze had spread to six other cars nearby.

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It comes after a 38-year-old man was killed in the front yard of a Cliveden Avenue home on Tuesday when he attempted to intervene in a dispute between five people and a male resident.

He was fatally shot at close range by a 12-gauge shotgun and the group fled the scene.

Detective Superintendent Andrew Massingham said two suspects wanted over the shooting have been arrested this week but no charges have been laid.

A 26-year-old woman was the first to be arrested in Brisbane CBD on Tuesday afternoon.

Police then took a 26-year-old man into custody at Mackenzie around 11pm Wednesday, following the fire at Dutton Park.

Image: 9News