Expert: Internet increasing risk of CBRN attack

Extremists have gained greater access to the technology and information needed to create and spread biological and chemical agents, according to Charles Farr, the director of the U.K.'s Office for Security and Counterterrorism.

Farr, speaking as part of an official assessment, said that countering the threat of WMDs to the U.K. from international terrorists is becoming more expensive and harder, according to the Telegraph.

"Biological will get easier from a terrorist point of view," Farr said, the Telegraph reports. ""It takes more to do the same amount of counter-terrorism work."

In an annual report on the its Contest counterterrorism strategy, the Home Office warned that terrorist threats have spread more widely across the globe and need more and more resources to combat.

Farr cited numerous factors that are increasing the likelihood of an attack, including the availability of information on the internet, an increase in the teaching of biological sciences at universities and the "greater availability of technology," according to the Telegraph.

To combat the spread of weapons, the U.K.'s Home Office started enforcing a list of controlled biological agents to require that dangerous pathogens and toxins be used and held securely for important medical and scientific research.