The US is still looking to European governments to speed up the extradition of terrorist suspects, Robert Mueller, the director of the FBI, made clear on Wednesday.

“We are always looking to see how we can make the extradition process go faster,” Mr Mueller told the FT. “We think we owe it to the victims of terrorism to see to it that justice is done efficiently and effectively.” He added that successful cases of extradition of terrorist suspects to the US had the additional “benefit” of increasing the intelligence available generally to those fighting terrorism.