Gardaí have released two men who were being held in connection with the investigation into the murder of Baiba Saulite in Swords, Co Dublin, last November.
One of the men is a foreign national in his 30s. The other is a well known member of one of Limerick's feuding gangs.
Baiba Saulite with photos of her sons after they were abducted by their Lebanese father
They were both arrested yesterday at 7.30am at Mountjoy Prison, Dublin, where they are serving prison sentences. They were returned to the jail this morning.
A third man (24) was arrested in Mountjoy Prison last night. He is still being questioned at Coolock Garda Station.
Ms Saulite (28), a Latvian national, was shot dead in the hallway of her home on Feltrim Road, Swords, Co Dublin, on the evening of Sunday, November 19th. Her sons, aged three and five, were asleep upstairs.
Gardaí believe the murder was carried out by a contract killer. They believe a man who wanted her dead may have approached Irish criminals and organised for them to shoot her.