Security Minister James Brokenshire insisted the UK has foiled 25 terror plots in three years as he faced questions in the wake of the Reading attack.
The UK has “some of the finest security and intelligence services in the world” despite a “diverse terror threat,” he added.
Mr Brokenshire said the excellent work of police and security services had managed to disrupt or prevent 25 attempted terrorist attacks over the last 36 months.
This comes in the wake of the investigation into the Reading Park knife attack which killed three people, revealed that the suspect came to the attention of MI5 last year.
The 25-year-old man, understood to be named Khairi Saadallah, was detained a short distance from the scene at Forbury Gardens and arrested on suspicion of murder, but Mr Brokenshire refused to confirm or deny reports the suspect was known to the security services.
“We don’t comment on issues of security – who is or is not subject to investigation or any interest to the security services,” he said.
But he insisted there is “plenty that is taking place to get justice,” adding: “This is a very live police investigation and I’m limited in what I can say this morning as a consequence.”