British police are still trying to determine if last week's botched car bomb attempts in London and Glasgow were the work of a small group of people in Britain, or part of an international plan.
The investigation is continuing into the weekend, when Britain will mark the second anniversary of the July 7 terrorist attacks in London.
Investigators are still searching homes and offices of the eight suspects arrested in the case. All were foreigners working in the state health system. At least five of those implicated in the botched attack appear to have some link to a hospital near Glasgow.
One of the suspects was arrested in Australia. Police investigating the case there say they raided two hospitals in western Australia and seized computers and files. Australian Federal Police Commissioner Mick Keelty says investigators are trying to gather information about a possible terror network.