A 10-week-old boy has been found dead at a house in Northamptonshire.
Police were called to the house in Rose Avenue, Rushden, to investigate a disturbance at about 2325 BST on Tuesday.
An initial post-mortem examination was carried out on Wednesday evening, but the cause of the baby's death is still unknown.
Further tests are being done.
A 44-year-old man and a 39-year-old woman were arrested at the house.
They have been released on police bail pending further enquiries.