In the North, a 43 year-old man arrested over the death of Nelson Cheung has been released unconditionally.
A 14 year-old boy and a 16 year-old girl are among six people still in custody over the murder in Randalstown.
Mr Cheung and his wife Winnie were travelling home from his business - when robbers forced his car off the road.
It's believed he was killed in front of his wife.
She managed to escape and was treated in hospital for knife wounds.
