The detained suspect has been identified as Khalid Ali and was arrested in April 2017 on charges of preparing acts of terrorism.
He was arrested from Westminster and at least three knives were also discovered and confiscated from him by the police forces.
The police in UK also released the interrogation footage of the suspect where he admitted being in Afghanistan and detonating explosives.
In response to a question regarding the casualties inflicted on civilians or security personnel in Afghanistan, Ali has said “I will remain silent.”
The anti-government armed militant groups frequently use explosives materials for the roadside bombings and car bombings to target the government staff and security personnel.
However, in majority of such incidents the ordinary civilians are targeted besides such bombings incur casualties to the security personnel and in some cases the Taliban militants themselves are killed or wounded.
A total of 10,453 civilian casualties – 3,438 people killed and 7,015 injured – were documented in the 2017 Annual Report released last month by the UN Assistance Mission in Afghanistan (UNAMA) and the UN Human Rights Office.
The report further added that the high number of casualties to the civilians were inflicted by suicide bombings and other attacks using improvised explosive devices (IEDs).