Emergency dispatchers said the bodies of Edward Arrivello and Karen Wanner were found Tuesday morning in the apartment in Cumru Township.
Police said Wanner has moved out of the apartment where she had previously lived with Arrivello but returned for an unknown reason. She was stabbed multiple times and shot when she returned.
Investigators said Wanner was killed by Arrivello, who later shot himself.
Police say both Wanner and Arrivello were deaf and 54 years old.