A post-mortem examination carried out to determine what caused the deaths of two people from Frankley in Birmingham has proved inconclusive.
Both deaths are unexplained and more tests will be carried out.
Suzanne Van Hagen and John Morton were found dead by their nine-year-old daughter.
The young girl is now being looked after by family.
Investigations continue. Anyone with information is asked to contact West Midlands Police.
More top news
A severely disabled baby at Northampton General Hospital should be allowed to die, a High Court judge has ruled.
West Bromwich Albion's pre-season friendly against PSV Eindhoven has been called off by Dutch police.
Jason Queally won a gold and a silver medal at the 2000 Sydney Olympic games.