Athletics Integrity Unit (AIU) has suspended Kenyans Purity Temutai Komen, Rebecca Jepchorchir Korir, James Karanga and Ester Borura for failing anti-doping rules.
Komen, the reigning Istanbul half marathon champion was flagged for two accounts, Presence of a Prohibited Substances (Norandrosterone) and evading sample Collections.
The 25 year old has been suspended pending investigations.
Korir on her part, was suspended for the presence of a Prohibited Substance (Methylprednisolone) and a notice of charge has been issued to her.
Karanja who has been suspended for the use of the Prohibited Substance (Norandrosterone) and a notice of allegation has been issued to him.
Borura has also been provisionally suspended for the use of the Prohibited Substance (Norandrosterone) and a notice of allegation has also been issued to her.