Technology companies must bear “some of the responsibility” for terrorist attacks, a security minister told Sky News following the bombing at Parsons Green station.
Ben Wallace said such firms could “do more” to prevent acts of terrorism taking place.
Thirty people were injured in an explosion at the west London Tube station during Friday morning’s rush hour.
An 18-year-old man was detained at Dover in what was described as a “very significant arrest” following the attack.
The search of a residential property by armed police in Sunbury-on-Thames was described as “directly linked” to that arrest.
Mr Wallace said terrorists were grooming people online, and the Government was “constantly trying to build…pressure” on technology companies to take down terrorist content.
“They cannot be removed from some of the responsibility they carry and we think there is technology out there that could make these take downs quicker,” he added.
“It is a 21st century phenomena. We have to deal with it. On the internet people can learn how to make bombs, they can learn how to use weapons.”
Mr Wallace is the latest in a number of Government ministers to criticise technology companies after the five terrorist attacks which have happened in the UK this year.
Following the Westminster atrocity, Facebook, Google, Twitter and Microsoft said they would increase their efforts to fight terrorist content online.
Not all observers believe that technology companies are the prime facilitators of terrorist activities, however.
Professor Peter Neumann of Kings College London’s War Studies department, disagreed with media claims that technology companies were to blame.
Responding to an image of the front page of the Daily Mail which claimed in its headline “Web giants with blood on their hands”, Professor Neumann tweeted: “Nonsense.”
“Bomb-making instructions widely available for ages. Long before internet. Doesn’t mean it’s easy to do, though” he wrote.
David Videcette, a former counter-terror detective who was involved in the 7/7 investigation, responded: “Totally agree.”