They placed the estimate of the drugs at over Sh1 billion, although independent experts say its street value cannot be more than Sh300 million.
The drugs were extracted from the 1,800 litres of the ship’s diesel reservoir where they were concealed when it was intercepted off the Kenya coast in Lamu by Kenya navy officers.
Head of the police Anti-narcotics Unit Hamisi Massa said they had surrendered samples of the drugs to the government chemist for further analysis as they undertake further investigations.
”We are continuing with our search… we have also been able to recover 28,600 of water which actually tested positive of heroin,” he said.
“We have also recovered 1,800 litres of diesel which had also traces of heroin.”
This comes as another success story for police in drug confiscation within and off the shore of the Kenyan coastline.
On April 25, Australian Navy sailors patrolling the coast of Africa seized more than one tonne of heroin on a suspicious sailing boat.
The Navy estimated the street value of the heroin at $290 million (over Sh20bn).
Crew from HMAS Darwin boarded the wooden boat east of Kenya and discovered 46 sacks of heroin hidden among bags of cement.
The Navy said the drugs from the dhow were taken aboard HMAS Darwin.
Police have vowed to enhance the war against drug trafficking where Mombasa is worst hit among other major towns in the country.