The Ukip leader said he would consider bringing back detention without trial for terror suspects
Mr Nuttall said he “wouldn't take anything off the table” when it came to dealing with the threat of violent extremism, including a return to internment.
He told BBC1's The Andrew Neil Interviews: “When you read this morning there's a suspected 23,000 jihadis living amongst us, obviously MI5 are stretched to capacity at this present moment in time.
“I think we've got to look at ways of ensuring that our people are safe, whether that is a return to control orders, whether that is tagging these people, who knows in the future maybe a return to internment.“
A policy of internment was adopted by the government in Northern Ireland in the 1970s when it was widely adjudged to have acted as a recruiting sergeant for the IRA.
Mr Nuttall said, while he was not advocating an immediate return to detention without trial, it should not be ruled out for the future given the scale of the terrorist threat.
He said: “If you consider that it costs roundly a million pounds year to have 24/7 surveillance on these people, we're talking a vast amount of money.
Mr Nuttall warned attacks like the Manchester bombing could become commonplace
There's a suspected 23,000 jihadis living amongst us
“I'm not saying now is the time to return to this, but I wouldn't rule it out.
“I wouldn't take anything off the table in the future because, as I say, unless we get a grip on this what happened in Manchester the other night, which is part of my constituency, could become commonplace.
“And that's the last thing we want to see.“
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Snap election 2017: The pictures politicians may not want you to see Sat, May 27, 2017
Protests, fights and daleks, it's all happening as the politicians hit the campaign trail for the snap election
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Jeremy Corbyn during a visit to Hackney Marshes Football Pitches, to highlight Labour's manifesto commitment to ensure 5% of the Premier League's television rights income is diverted to the grassroots game, during a General Election campaign
Mr Nuttall restated his support for waterboarding when interrogating suspects
Mr Nuttall reaffirmed his support for “hard measures”, including waterboarding, in the interrogation of terrorist suspects if their use could stop an immediate attack.
He said: “If we were in the situation where there was going to be an immediate attack and people's lives were on the line, I want to see British families protected. I would put their lives over the human rights of any jihadi."