There has been a tense stand-off between anti-fracking protestors and police at a site in Salford.
Energy company IGas is preparing to start drilling in Barton Moss to see what type of gas or oil can be found.
But campaigners say they are worried about the environmental impact and are pledging to disrupt the process.
Elaine Willcox reports.
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Greater Manchester Police said "inquiries are ongoing to fully understand the circumstances of the incident."
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He served in Margaret Thatcher's Cabinet as Home Secretary in 1989 and was also a former Governor of Bermuda.