The wife of Kenyan President Mwai Kibaki has burst into newspaper offices to protest at its portrayal of a row she had with a neighbour.
Lucy Kibaki has a reputation as a strong woman
Lucy Kibaki marched into the Nation Media Group offices in the capital before midnight, staying overnight.
She was angry over reports of how she had interrupted a farewell party for outgoing World Bank Kenya director, saying the music was too loud.
She slapped a cameraman and seized mobile phones and notebooks.
Mrs Kibaki said reports about her and her family were "unkind".
"If you think Kenyans are blind, and not intelligent, you cheat yourselves," she said. "They know who are the people you support in this country.
"But you don't have to ruin the lives of others by being so nasty."
Speaking on World Press Freedom Day, cameraman Clifford Derrick said he was "terrified at the way she was behaving" when she slapped him "hard" for refusing to give her his camera.
The BBC's Adam Mynott in Nairobi says the drama began on Friday night when the first lady went round to the house of Senegalese outgoing World Bank Kenya director Mukhtar Diop and three times demanded that he turn the music down.
On one foray, she is said to have tried to disconnect the electricity from the sound system.
Surrounded by armed guards, she called on a local police station, demanding that Mr Diop be arrested.
The antics of the charismatic first lady, who has a reputation as a woman not to be trifled with, was splashed all over the front pages of Kenya's newspapers - and it is this which prompted her to walk into the Daily Nation's offices.
There has been no response from the Kenyan government.