UPDATE: Canberra explosion not religiously motivated.

An explosion outside the Australian Christian Lobby’s headquarters in Canberra was not politically, religiously or ideologically motivated, police say.

The 35-year-old driver of a white van that exploded around 9.35pm on Wednesday night is in a critical condition at Canberra Hospital.

Police believe the driver ignited gas cylinders within the vehicle, causing an explosion which damaged the vehicle and Eternity House on Campion Street in Deakin.

ACT Policing commander Mark Walters said police had spoken to the driver and did not believe the attack was motivated by politics, religion or ideology.

Nor was there any ongoing threat to the community, he said.

The time of day suggested an accident rather than an attempt to murder infidels.