The team representing the Capital City Nairobi, was stunned 3-1 by Kirinyaga County in the boys category playing in pool A while Kwale emerged 2-0 winners over Mandera.
In pool B, Kakamega went down 0-2 to Homabay while Kisii and Nakuru played to a 1-1 draw.
In the corresponding girls competition, Busia County was the biggest winner of the day after demolishing Laikipia 9-0 in pool A as Migori saw off Marsabit 6-1.
In pool B, Mombasa County were thrashed 0-5 by Homabay while Kiambu went down 1-2 to Machakos.
The matches continue tomorrow (Friday) with Nairobi seeking to redeem itself when they take on a wounded Mandera side in the boys category before Kwale aim to continue with its winning run when they face Uasin Gishu County.
Pool B will see Homabay clash with Nakuru as Kakamega lock horns with Embu.
In the girls fixtures high flying Busia will entertain Marsabit, Migori play Uasin Gishu in Pool A while in Pool B, Machakos will play Mombasa as Kiambu and Nyandarua face-off.The semi-finals are set for November 21, third place play-offs November 22 before the finals on the same date.
Four teams from both girls and boys will progress to the national finals to be played from the December 3-12 in Nairobi with the grand final being played on Jamuhuri Day.
By Fred Odanga Azelwa.