The 53-year-old man, described on the home's website as a co-founder and co-owner of the “pedagogical community”, was stabbed several times along with a woman, Bern cantonal police said.
Officers made the grisly discovery on Saturday after being called to the orphanage, located close to the Spiez train station.
Police continue to look for witnesses who may be able to shed light on what happened.
The investigation so far has been able to establish that the woman victim was not an employee in the privately run home, where nine children ranging from five to 14 years of age were being looked after.
Police on Monday said they were still tracking down the woman’s identity and the causes of her death.
The Bern cantonal department for youth said steps were being taken to look after the foster children on a temporary basis.
They were reportedly unaware of the attack when it occurred.
Investigators on Monday searched the area around the home but police said they were unable to find the weapon used in the attack.
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