A mix-up of water saw athlete Wesley Korir exit the 42- kilometre race at the just concluded Rio Olympics.
The Cherangany MP said the confusion caused him stomach upsets that forced him to exit the race at 30 kilometre
mark.
Korir, a first term MP, lost his opportunity to
complete his Olympic medal collection, having taken bronze in 2004 and silver in 2008 in the 5000m race.
He said his special water was
switched
with that of athlete Stanley Biwot; and they both ended with each others bottle.
"Water mix up at 30km where I was handed Stanley's special drink caused serious stomach problems for us," he said in a tweet.
The legislator, who was with four other Kenyan athletes, was forced to break the leader pace he had kept through the halfway mark; he did not finish the race.
Korir - the country's team captain - blamed Kenyan officials in Rio for the confusion which saw him borrow water from other athletes.
"I missed my drinks 3 times due to poor Kenya water officials handling and had to borrow Eliud's at some point too which made me throw up in the middle of the race," he said.
"Elite athletes have special drinks placed every 5km in a race and I use
which is different from Stanley's," he said.
Korir was the top Kenyan finisher at this year’s Boston Marathon, placing fourth in 2:14:05 behind a trio of Ethiopian athletes.
The 33-year-old set his personal best of 2:06:13 when he finished fifth at the 2012 Chicago Marathon.
Kenyan runner Eliud Kipchoge scooped the gold medal in Sunday's marathon, beating silver medalist Feyisa Lilesa of Ethiopia by one minute.
Galen Rupp of the United States won the bronze medal.