Nine days after the attack , an arson attack against a mosque in California was committed at Escondido . Police found graffiti on the mosque 's driveway that referenced the Christchurch shootings , leading the police to consider the fire as a terrorist attack . The Poway synagogue shooting took place on 27 April 2019 , killing one person and injuring three others . The perpetrator claimed responsibility for the previous mosque fire , attempted to livestream the shooting , and praised the Christchurch shootings in a manifesto . Both the perpetrator and Tarrant were radicalized on 8chan 's / pol / discussion board
Poway synagogue shooting
Poway synagogue shooting
Christchurch mosque shootings