The article revealed that goalkeeper Tony Warner was set to return to his previous club Millwall after just one season in south Wales.
It is understood that Cardiff City's press office contacted the Echo sports desk complaining that Bloom had quoted "a source" in the piece - a standard procedure among local and national press..
As a result they claim Bloom contravened Hammam's new media policy which places restrictions on reports about the Championship club which have been described as "Draconian and unworkable".
The Echo were then told that Hammam had banned Bloom from the ground.
Ken Gorman, chairman of the Welsh Football Writers' Association, is angered by the move.
"Mark is one of the most hard-working and honest football writers in
"What's more he has been a lifelong supporter of
Bloom's ban will come into force from Friday when Cardiff are set to hold a press conference for new midfielder Jeff Whitley, with the Echo reporter being told to stay away.
Hammam has apparantly consulted journalists about his media policy and that it would be "open to modification" however, without consultation, he has acted on it already.
The owner's policy was drawn up in an attempt by the club to have some control over the media, outlining club disciplinary procedures against journalists who do not adhere to it - promising a "sliding scale of sanctions" on journalists who:
· Refer to "insiders" in any story they write.
· Speak to a Bluebirds' player about club matters when he is on international duty.
· Pursue a "predefined negative agenda".
· Do not have prior approval from the club before approaching any players at away games.
· The club feels consistently report in an "unbalanced" way..
And Gorman has described their media demands are unrealistic.
"Like in any sport, a football writer cannot be expected to suppress any stories which are of interest to readers - even if they are critical of a club," he said.
"The ban appears to be very harsh.
"It is a severe sanction for a man who is only doing his job.
"I appeal to Sam Hammam to reconsider his decision."
Mark Bloom added: "I will continue to live and report on my home club, a club that I supported as a youngster, regardless of any ban.
"I was born in
"I'm in a fortunate position to be able to report on my local club, but I have to take a professional stance on any subject and report matters in an unbiased way."
Despite talks between the Echo and the club's media office yesterday, they refused to lift Bloom's ban.
The Echo explained: "City fans turn to the Echo for an objective report on THEIR club. They trust us to be impartial and to give them the facts.
"Positive or negative, readers always know that our articles offer an independent view.
"Now
"The Echo wants to tell our readers about City's success, about a new stadium being completed and about the club achieving its Premiership dream.
"But we will do that from a position of integrity and honesty.
"Readers expect the Echo to decide what we write about
"That will not change. I believe Sam should think again about this ban, and see that it is damaging to Cardiff City FC, the Echo and more importantly the fans who turn to the Echo for all the
The club confirms that accreditation will not be granted to South Wales Echo journalist Mark Bloom for a period of three months.
"We need people to be open and frank about issues concerning the club, but there is a huge gulf between this and non-factual stories.
"We regret that we have had to take this action and hope that it doesn't hurt our relationship with the South Wales Echo.
"This is not a decision we have taken lightly, but feel that under extreme and constant pressure we as a club have had to take a stand against highly inaccurate stories concerning players and our finances.
"We must reiterate as a club we encourage and need open and frank discussions to take place, but cannot and will not continue to put up with inaccurate and unsubstantiated stories that have violated us and have had a massive negative affect on our club.
"We realise that the pen is mightier than the sword, but we have to take a stand against inaccurate and unmerited stories.
"The exclusion will take place immediately and will run until at least September 29 depending on further conduct."