BBC Radio Nottingham:
"We have gone into a siege mentality and have to as the abuse has got personal."
He added: "We were here last season and I'm past worrying about it. I'm focused on playing football and working for the boys out there who care.
"There is a lot of things at the club behind the scenes, a lot of politics where people are trying to stir up trouble and it's turning on the players now," said Murray.
Stags manager Paul Cox also suggested off-field matters were affecting the club, but refused to let his players be distracted by problems outside their control.
who signed a new contract in the summer,
did not expand on the issues but added: "Me and the players know what is happening. We know some of the politics going on behind the scenes and we are not politicians we are footballers.
"It's definitely galvanising the players; it did last year. Whatever the scenario on that, we will try win football matches and leave the politics and all that stuff to those who wants to do that."
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.