A law enforcement official says the person believed responsible for an explosion at a California fertility clinic posted online ramblings including a belief that the world should not be populated.

Get all the news you need in your inbox each morning. Mills said the identity of the person of interest would not be released immediately to preserve the integrity of the investigation.

The car bombing outside a California fertility clinic that killed one person and injured four others appears to have been driven by anti-natalist ideology, according to two senior law enforcement officials briefed on the incident.