According to Cambridgeshire police, “An investigation is currently being carried out following a public complaint, therefore it would be inappropriate for us to comment any further on this matter.”
Previously the police admitted that it tried to recruit the four campaigners but denied some of the misconduct accusations.
However, a source close to the investigation said to the Guardian that one of the officers was notified that he was the subject of misconduct allegations, the second officer no longer works for the police.
The investigation started after four campaigners confessed that they felt intimidated after police tried to turn them into informers and make them spy on other environmentalists, campaigners against government cuts and anti-racist activists.
They accused police of coercive and at times repeated approaches caused the campaigners to give up their political activities, or feeling stressed and paranoid.
Earlier this month Amnesty International in the "State of the World's Human Rights Report 2014/2015" expressed its concern about the reduction of civil liberties in Britain.
Amnesty International UK Director Kate Allen stressed that all British citizens should worry “about waking up in a surveillance state, without having a proper public debate about it first”.