No-one was injuried in the attack, according to the company’s managing director, who said it followed a series of online assaults.
The incident occurred at the Canberra headquarters of the Australian Christian Lobby.
The group’s managing director Lyle Shelton Tweeted: “A vehicle has rammed our office in Canberra & exploded all staff are safe.
“I do not know the condition of the driver. Prayers appreciated.”
“We have had the normal trolls on social media and even had death threats sent to our Canberra office over the year but I am very concerned someone would do this
“It is a relief the building was unoccupied at the time and we are all very thankful our staff are all safe.
“Obviously this is very unsettling to us but also to anyone in Australia, for this to happen in Canberra, our nation’s capital is very disappointing.
“It is something I thought would never happen here, I can’t believe it.”
“There are no public safety issues and ACT are seeking any witnesses to the incident.”