Police have launched an investigation after a man and a woman were found dead at a house.
Their bodies were found at a property in Cumberland Street, in Woodbridge, Suffolk, after police were called at about 18:15 BST on Saturday.
The pair have not been named by police but the National Trust at Sutton Hoo said both had been charity volunteers.
Suffolk Police said the deceased were “known to each other” and there was “no wider threat to the community”.
In a statement, the National Trust said it was aware of the ongoing police investigation.
“We have been left deeply saddened by the news that it involves two of our volunteers. Our thoughts are with their family at this sad time,” the statement said.
A police cordon remains in place while an investigation into the circumstances of the deaths continues.
Sutton Hoo is an Anglo-Saxon royal burial site managed by the National Trust.