Law enforcement agencies across Australia must work together to prevent local criminals from funding overseas terrorists, NSW Police Commissioner Andrew Scipione says.

"It is a concern of police, it's a global issue," he told reporters on Monday.

"The notion of any assistance given to any organisation anywhere in the world ... is abhorrent, we know that terrorism can't happen without funding."

Mr Scipione said he believed law enforcement should think laterally because some of the funds were being exported outside the bank system.

"We have to look at every option because not all the money would go out necessarily through traditional means," he said.

Mr Scipione said thefts or ATM raids could be among crimes being used to fund terrorist activities.

"I don't think there's any barrier to what people will do in order to fund their criminal enterprises, be it here or anywhere," he said.

News Corp Australia reported on Monday that a top concern for the Counter Terrorism Squad was young Australians being recruited and involved in terrorist camps overseas, especially in Syria.

In one local case, News Corp reported, a known extreme radical was involved in a theft and was caught on listening devices saying he wanted his portion of the robbery to go to the "cause".