The officers were arrested alongside a trader identified at Mayoni area after members of the public reported that the vehicle was ferrying suspicious goods.
Mumias police boss Peter Katam said the illicit liquor is believed to have been sneaked into the country through the Busia border and was being ferried to Kakamega Town.
The nabbed alcohol, which was in sachets, was estimated to be worth Sh200,000. The three were detained at Mumias Police Station as further investigations continue ahead of their arraignment.
Meanwhile newly appointed Ethics and Anti-Corruption Commission CEO/Secretary Twalib Abdallah Mbarak will today assume office after taking an oath.
He will be sworn into office by Chief Justice David Maraga to succeed Halakhe Waqo after end of his six-year term.
Mbarak was vetted last December by the National Assembly Justice and Legal Affairs Committee chaired by Baringo North MP William Cheptumo after the anti-corruption agency nominated him.
During the vetting, he said he would take a fresh look at pending files to establish why they have not been forwarded to the Directorate of Public Prosecutions.
He also promised to look at the corporate image of the EACC and vet all staff to establish their integrity and suitability for their jobs. He comes to office when the commission is facing pressure to deliver services to address corruption cases in the country.
Elsewhere, Police are looking for a gang that raided a salon and an Mpesa shop near Nextgen Mall along Mombasa Road, Nairobi and robbed customers and management of money and valuables. The gang is said to have ordered some customers who were in the salon to lie down and surrender their valuables as they ransacked the cashier and escaped with the loot. They then attacked a nearby Mpesa shop and escaped with unknown amount of money. No arrest has been made over the Saturday night incident. In Gigiri, a gang raided a home and robbed the occupants of Sh1 million and gold valued at Sh1.8 million. Police suspect the gang was aware of the presence of the gold and cash hence pointing to an inside job. A team of police is hunting down the gang behind the incidents.