At a news conference shortly after the London attack, May said "enough is enough" and vowed to crack down on extremism.
May has been under pressure over her record as home secretary, including over policing cuts and questions over intelligence failures, following terror attacks on London Bridge, in Manchester and in Westminster.
"I mean longer prison sentences for those convicted of terrorist offences".
May said that she was looking at "how to make it easier to transport foreign terror suspects and to increase controls on extremists where it is thought they present a threat, but there is not enough evidence to act against them".
Addressing Conservative Party activists in the British town of Slough on Tuesday, May said she would "restrict the freedom and movements of terrorist suspects when we have enough evidence to know they are a threat, but not enough evidence to prosecute them in full in court", according to the BBC.
"If human rights laws stop us from doing that, then we will change those laws", she told LBC radio.
"If I am elected as Prime Minister on Thursday, that work begins on Friday".
Jihadis next door'As we see the threat changing, evolving becoming a more complex threat, we need to make sure that our police and security and intelligence agencies have the powers they need'.
This might also be an attempt at strengthening the Terrorism Prevention and Investigation Measures (TPIMs) "When we reduced it to 14 days, we actually allowed for legislation to enable it to be at 28 days".
Russia may raise oil output to 551 MT in 2018
He said the nation's oil production was still hovering around 1.5 million barrels per day, down from around 2.2 million b/d. Brent crude oil futures briefly rose above US$50 per barrel in early trading, but had dipped back to US$49.94 by 0040 GMT.
After the ISIS called for attacks in the West in September 2014, the British security services grew increasingly concerned that al-Muhajiroun members, who had remained in the United Kingdom, would carry out terrorist attacks.
A 30-year old man was arrested in east London early Wednesday, police said.
Mr Khan said the force stood to lose between 3,400 and 12,800 constables, a reduction in strength of ten to 40 per cent, making it harder to foil future terrorist atrocities.
"And responsibility for that lies squarely with Theresa May and her dereliction of duty".
"Choudary was for years the single person most responsible for Islamist recruiting and propaganda, but he wasn't charged until 2015, when May had been Home Secretary for five years", said Dr Neumann.
He said the PM's plans "would potentially give the police more powers to control people who there might not be enough evidence to bring to court".
"All she would do is reduce freedom, not terrorism".
"If Theresa May does what she threatens, she will go down in history as the Prime Minister who handed terrorists their greatest victory", said the group's director Martha Spurrier. However, dismantling human rights to fight human rights abuses is certainly not a good counter-terrorism strategy - especially when multiple reports suggest British authorities could be guilty of neglecting multiple warnings about the attackers involved in the Manchester and London Bridge attacks.
The prime minister and her Labour Party opponent, Jeremy Corbyn, set out on whistle-stop tours of the country ahead of Thursday's vote, with polls all showing May's Conservatives ahead but disagreeing about whether the race is close.