Classic 105 radio presenters Maina Kageni and Daniel Ndambuki alias Mwalimu King'ang'i are facing possible disciplinary action over what the Kenya Film and Classification Board (KFCB) terms as airing adult content during the watershed period.
On Tuesday, the board's chief executive Dr Ezekiel Mutua said they are concerned with the increased adult content in free to air radio and TV stations in the country.
Others radio presenters being probed for improper conduct Joseph 'Gidi' Ogidi and Jacob 'Ghost' Mulee of Radio Jambo.
Classic 105 FM and Radio Jambo are owned by Radio Africa.
Dr Mutua termed the content aired by the radio presenters runs contrary to Kenya's programming code.
The self-styled 'moral police' said KFCB is consulting with the Communications Authority of Kenya (CA) to ensure that the trend is stopped.
He appealed to media houses to adhere to the terms and conditions stipulated in their broadcast licenses and promote professionalism.
KFCB has already banned the airing of two television adverts by Marie Stopes and Pwani Oil's Fresh Fry.
Dr Mutua blamed broadcasters for not complying with provisions of the Films and Stage plays Act Cap 522 and the Programme Code for free to air Radio and TV stations.
The High Court in May ruled that all advertisements as captured by section 2 of Cap 222 are films and therefore must be submitted to the board for examination and classification prior to broadcast.