Addressing members of the media fraternity who attended a meeting convened by the Organ for National Healing, Reconciliation and Integration in Harare, Cde Shamu said people rely on the media for information on current events.
However, some media houses are now departing from their mandate and are focusing on attacking individuals and elevating rumours to become news.
Cde Shamu said the media can play a crucial role in reaching out to the people but sometimes limitations of space and time results in journalists writing or telling an incomplete story.
He however said some organisations purport to be reporters of truth when in actual fact they will be reporting falsehoods, thus distorting the whole picture.
Cde Shamu warned media organisations that exaggerate stories and use misleading headlines, not to jeopardise the gains achieved by the Organ for National Healing, Reconciliation and Integration as the nation preparers for a constitutional referendum and a general election scheduled for next year.
He urged media organisations to guard against local and external manipulation and abuse that can lead to conflict.
The meeting also provided a platform for representatives of media houses to seek clarification on issues that affect them in their operations.