A teenager is due to appear in court charged with terrorist offences.
Andrew Ibrahim is accused of possession of an explosive substance, intent to commit terrorism and possession of articles for terrorist purposes.
The student was arrested on 17 April and three controlled explosions were later carried out at his flat in Westbury-on-Trym, a Bristol suburb.
His hearing will take place later at City of Westminster Magistrates' Court, in central London.
'Complex inquiry'
Police said the teenager was accused of possessing Hexamethylene Triperoxide Diamine, also known as HMTD, which is an explosive organic chemical compound.
He is also accused of possessing two home-made vests, ball bearings, air gun pellets, nails and screws, wired circuitry, batteries and electric bulb filaments.
Assistant Chief Constable Jackie Roberts, of Avon and Somerset police, said the police investigation involved more than 100 officers and had been challenging and complex.
Mr Ibrahim, the son of an NHS consultant, is thought to have recently converted to Islam.
Speaking ahead of his court appearance, Mr Ibrahim's family said they had been left "shocked and deeply distressed" by the events of the past fortnight.
^ Back to top | BBC Sport Home | BBC Homepage | Contact us | Help | ©
~RS~q~RS~~RS~z~RS~24~RS~)