Two men arrested and held for two weeks in connection with so-called failed car bombs in London and Glasgow have been released without charge, British police said.
The men released on Sunday, aged 28 and 25, were arrested on July 2 in Paisley, Scotland, police said.
Mohammed Asha, 26, was the only suspect remaining in custody without charge.
British police were given more time on Saturday to question Asha, who was arrested on a motorway in Cheshire, northern England, on June 30. His detention warrant will now expire on July 21.
Three men have so far been charged over the attacks.
Charged
Sabeel Ahmed, 26, of Liverpool, was charged on Saturday with failing to disclose information that could have prevented an "act of terrorism".
Earlier the same day, Australian police charged Mohamed Haneef, Sabeel's second cousin, with "providing support to a terrorist organisation".
Bilal Abdulla, a 27-year-old doctor who trained in Iraq, was charged in Britain last week with conspiring to cause explosions.
A seventh man, Kafeel Ahmed, 27, an Indian engineer who is Sabeel's brother, is under police guard in hospital after being badly burned when a sport utility vehicle was driven into an airport terminal building in Glasgow, Scotland, and set ablaze on June 30.
That attack came 36 hours after the discovery of two cars packed with fuel, gas tanks and nails in central London.
Police think the two incidents were linked.
All but one of the eight original suspects are medics.
Dana Asha - the wife of Mohammed and the only woman among those detained in the case - was arrested at the same time as her husband, but was released without charge on Thursday.