The phrase "a message believed to" is correct and usable in written English.
It can be used when referring to a message that is thought to convey a certain meaning or information, often implying some level of uncertainty or assumption.
Example: "The report contained a message believed to indicate a shift in company policy."
Alternatives: "a message thought to" or "a message presumed to".
In a taped message believed to have been recorded by Mr. bin Laden, the group gave European countries three months to pull their troops out of Muslim countries like Afghanistan and Iraq or face attacks like the train bombings in March in Madrid, which killed 191 people.
Moreover, analysts regard the new taped message believed to be from Osama bin Laden as a summons to his followers, and perhaps to new sympathizers, to conduct actions against the American targets in response to the possible war in Iraq.
In the last audio message believed to be from him, the fugitive leader vowed to fight until victory or martyrdom.
The church produces inspirational movies on DVD, which are big sellers, and offers a service that sends daily text messages, believed to offer divine protection, to subscribers' cellphones.
In recently taped messages believed to be from Mr. bin Laden, the Qaeda leader called for suicide attacks against America and its allies.
Then in August, the US tech giant has found itself hit by a text message scam believed to have originated from a private Israeli security company.
This paper seeks to examine some of the complexities underlying the formulation of practices in a context where the public health message is believed to be pragmatic and straightforward: "you either do or you don't".
As Iran gears up for parliamentary elections at the end of the month, an instant messaging app believed to be used by one in four Iranians is set to play a major role.
The IS group, which uses social media in recruiting and spreading its message, is believed to harbour ambitions of launching a cyber-war against the West.
The conflicting messages are believed to reflect a power struggle between Mr. Ahmadinejad and Iran's conservative establishment.
