The investigation revealed that the two half-brothers aged seven and eight died as a result of 'repeated and severe traumatic violence'. The investigation also showed that the boys offered heavy resistance.
Neighbours heard a lot of noise and shouting and one even alerted the police. A police patrol failed to record any disturbance when it attended the scene.
The boy's mother has been detained and is in the psychiatric wing of prison. The police say that the woman suffers hallucinations. Dendermonde prosecutors want to establish whether the police could not have offered more assistance.