A pathologist has failed to discover what killed two children found dead at their home in Wandsworth.
Further tests will now be carried out.
The children were found dead by their father on Wednesday evening after he returned home from work.
Their mother has been arrested.
Felicia Boots is believed to be suffering from post-natal depression
Mother accused of killing her babies appears at Old Bailey
A mother has been remanded in custody charged with murdering her baby son and daughter.