Over four days the pair left the twin babies at home while they partied and drank, according to local law enforcement.
"In the course of four days they were not feeding the children, and did not arrange alternative care for them," said a source from the investigation.
Police say they "subjected them to hunger, did not ensure hygiene, leaving the minors in a socially dangerous state".
The children were discovered after their grandmother became concerned at not being able to make contact despite a coronavirus lockdown. She contacted the police after finding the children.
The couple face up to 20 years in jail if convicted of murdering their baby boy.
They've also been charged with failing in their parental duties and subjecting the children to danger.