Kenya's 10km road race world record holder Rhonex Kipruto became the latest Kenyan athlete to be suspended for a doping offence on Wednesday by the Athletics Integrity Unit (AIU).
The AIU said the 23-year-old – who won 10 000m bronze in the 2019 world championships – had been "provisionally suspended" for the "use of a Prohibited Substance/Method (ABP)".
The ABP (Athlete Biological Passport) can show discrepancies that can reveal the effects of doping.
Kipruto set the 10km record of 26 minutes 24 seconds in Valencia in 2020 – he finished a disappointing ninth in the 10 000m at the Olympics in 2021.
Close on 70 Kenyan athletes – mainly distance runners – have been banned in the last five years for drugs offences in a crisis that has tarnished the East African track and field powerhouse.
In March, AIU head Brett Clothier warned during a visit to Kenya that the international anti-doping body was stepping up its investigations and testing in the country.
The AIU also said in April Kenyan athletes were being assisted in covering up doping offences by a "medically-savvy operation".
Its claims followed an investigation into falsified medical documents from marathon runner Betty Wilson Lempus and 800m specialist Eglay Nalyanya.
Lempus was given a five-year doping ban in January while Nalyanya was suspended this month for eight years for using a prohibited substance.
Kenya reacted by promising on 20 April that it would more than triple annual drug testing of athletes.
Sports Minister Ababu Namwamba said Kenya was targeting 3 445 tests a year – compared to the current 1 000 – for its 37 900 athletes and support personnel.
The plans were unveiled in a report issued by an anti-doping steering committee set up in December, 2022, after the government announced it was committing $5 million a year over five years to try to combat drug abuse in the sport.
The committee also announced proposals to beef up its investigation mechanisms and monitoring of athletes, with, for example, biological passports, as well as developing educational programmes.
The body is made up of representatives from Athletics Kenya, the Anti-Doping Agency of Kenya (ADAK), the AIU and the Kenyan sports ministry.