Two women held for questioning by detectives investigating the murder of former loyalist leader Jim Gray have been released from custody.
Jim Gray had been recently released on bail
Gray, 47, the flamboyant former leader of the Ulster Defence Association in east Belfast, was shot outside his father's house on the Clarawood estate.
Four men are still being questioned at Antrim police station about the murder.
The arrests followed a number of searches. The involvement of the UDA is a major line of inquiry, police said.
Gray was expelled from the illegal organisation last March.
He was recently released on bail on charges of money laundering, and was living at his father's home in Knockwood Park while awaiting his court appearance.
He was shot behind a car parked outside the house on Tuesday night at about 2000 BST.
The police said Gray had been warned that he was under threat since his release on bail.
Police kept the area of the killing cordoned off
In April, just over a week after being expelled from the UDA leadership, Gray was stopped by police near Banbridge, County Down.
He was travelling in a car towards the Irish border, and police suspected he was trying to leave the country.
The police found a bank draft for 10,000 euro and nearly £3,000 in cash in his car.
Gray claimed the money had come from the sale of two pubs in east Belfast.
However, police believed it was obtained through crime including extortion and drug dealing.
He was charged with money laundering and possessing the proceeds of crime and was remanded in custody.
As the police investigation continued, detectives seized more than 100,000 documents and raided council offices, planning offices and premises used by solicitors, estate agents and accountants.
He continued to apply for bail which was granted last month on condition that he lived at the address where he was shot on Tuesday.