The organisation condemned physical attacks and character assassination of journalists on social media.
"While responsible and ethical journalism should be the norm at all times, the recent remarks of a senior minister, accused of impropriety, about a woman television journalist in the social media, are deeply unfortunate," it said in a statement.
IWPC said several instances have been reported in the recent past including imputations made by individuals in positions of public authority.
"While journalists need to adhere to a code of conduct themselves in the execution of their jobs and refrain from media trials, a similar propriety of language and form is expected of persons occupying elevated positions of authority at all times, more so when they happen to be in government," it said.