A woman visiting court to witness murder charges against another woman has been arrested after allegedly stubbing a lit cigarette into a 9NEWS reporter’s face.

The 23-year-old woman pushed a baby stroller and blew smoke at journalists before allegedly stubbing the cigarette into the face of reporter Alex Bernhardt outside Caboolture Magistrates Court.

She has been charged with public nuisance over the incident.

The woman was in court to witness an appearance by Stevee Jane Kennedy, charged with the murder of a young father yesterday.

Ms Kennedy was charged with murder after the death of a 26-year-old man, reportedly her ex-boyfriend. He staggered into a Caboolture service station bleeding from an apparent stab wound.

The woman allegedly stubbed the lit cigarette into Bernhardt's face outside court. (9NEWS)

He was rushed to hospital but died a short time later.

Ms Kennedy was charged with his murder on Sunday afternoon and will face court again on July 24.