Bandari yesterday ended Tusker's unbeaten run after stunning FKF Premier League defending champions 2-1 in yesterday's match at Mbaraki Sportsgrounds, Mombasa.
Umar Kasumba and Andrew Juma's first half strikes were enough to help the dockers secure their second win of the season.
Jackson Macharia's late strike could not help Robert Matano's men whose lead at the top of the log has now been narrowed to a point following Nzoia Sugar's 1-1 draw with Kakamega Homeboyz.
Tusker came into the match on the back of six wins in a row but the dockers had other plans for them with Ugandan striker Umar Kasumba breaking the deadlock in the ninth minute before Juma doubled their lead in the 32nd minute.
Despite the defeat, Tusker are still at the top of the table with 18 points, followed by Nzoia Sugar.
It was equally a bad outing for AFC Leopards as they suffered a 4-1 demolition at the hands of Bidco United at Nyayo Stadium.
Francis Oduor gave Bidco the lead inside the opening 22 minutes before Ojo Olaniyi leveled for Ingwe after heading a corner kick for the match to head into the break tied at 1-1.
However, Leopards were reduced to an ordinary team in the second half with super substitute Henry Juma bagging a brace while Eric Gichimu added another goal for Bidco to seal their emphatic win and consequently second of the season.
In Thika, red hot Benson Omalla struck twice to steer record Kenyan champions Gor Mahia to a 2-0 victory against Posta Rangers at Thika Stadium. The former Western Stima striker once again rose to the occasion when K'Ogalo needed him the most after mid-week's 1-0 defeat to KCB in Nairobi.
The win saw Gor move to fifth with 13 points after six matches played as Posta dropped to seventh with 11 points from seven matches.
In Western, Vihiga Bullets picked their first win of the campaign after seeing off struggling Nairobi City Stars 2-0.
Simba wa Nairobi have been struggling since the season kicked off last year and the loss against Bullets saw them drop into the relegation zone.
In other matches, Kenya Police shot down Kariobangi Sharks 2-1 as Sofapaka trounced Mathare United 4-0 while Ulinzi Stars overcame Wazito 1-0.
WOnyango@standardmedia.co.ke