Police in London have released all but one of the people they arrested in connection with the Parsons Green attack on the London Underground earlier this month.
The Metropolitan Police announced on Tuesday that six of the seven suspects had been released without charge after spending several days each in police questioning.
It means that the only remaining suspect is the man who has been charged with personally planting the explosive, which partially detonated during rush hour on September 15, injuring 30 people.
Ahmed Hassan, 18, has been charged with attempted murder and an explosives offence for allegedly planting the device.
He was arrested by police at the Port of Dover the morning after the attack. He appeared in court last Friday and is due again at London's Old Bailey on October 13.
Here's a full breakdown of the seven arrests:
September 16, 7:50 a.m., Port of Dover: Kent Police arrest Ahmed Hassan, 18. Charged. September 16, 11:50 p.m., Hounslow, west London: Met Police arrest 21-year-old Yahyah Farroukh. Released September 21. September 19, 7:00 p.m., Newport, South Wales: Met Police and Gwent Police arrest a 25-year-old man. Released September 26. September 20, 5:10 a.m., Newport, South Wales: Met Police and Gwent Police arrest a 48-year-old man. Released September 21. September 20, 5:10 a.m., Newport, South Wales: Met Police and Gwent Police arrest a 30-year-old man at the same address. Released September 26. September 21, 12:05 a.m., Thornton Heath, south London: Metropolitan Police arrest a 17-year-old boy. Released September 22. September 25. 6:00 a.m., Cardiff, Wales: Met Police and South Wales Police arrest a 20-year-old man. Released September 26.
Police have the option of holding terror suspects for as long as 14 days without charge, provided they get permission from the courts.
All of the men above have been released well ahead of that deadline, with the longest custody having lasted seven days.