A substance believed to be heroin worth Sh4.5 million was seized in Nyali on Thursday and two Nigerian suspects arrested.
Police said James Chukwu and Gold Patience are wanted drug lords who had sneaked into the country. They will be deported once investigations are completed.
The substance weighing 1.5 kgs has been taken to the government chemist for further analysis.
Police said it was smuggled from Tanzania.
"The two suspects traveled from Nairobi to pick the drugs en route to Brussel," police said
In February, two suspected drug dealers were charged in Mombasa with trafficking 15 kgs of heroin worth Sh47 million.
Police had estimated that the heroin was worth Sh170 million.
Others who were apprehended in the operation in Bamburi and Mtwapa were identified as Rashid Athman, Athman Salim and Farida Omar.
- Calvin Onsarigo/The Star