muhbir

Etymology
,  from.

Noun

 * 1)  Someone who brings news.
 * 2) Someone who reports a problem or violation to the authorities; informant, whistle-blower.
 * 3) Someone who leaks confidential information in a company to its rivals; informant, telltale, rat.
 * 4)  Someone who relays information of misconduct to hurt others, especially out of spite; blabbermouth, snitch.