The police said they found one locally-made, cut-to-size gun loaded with one live cartridge on the 35-year-old suspect during a stop-and-search operation.
Both communities share boundaries and had been embroiled in an age-long land dispute over land.
The police command has killed two suspected armed robbers in two separate operations in the Warri axis.
The police command in Delta says it nabbed three suspected cultists and armed robbers in Warri and recovered ammunition from them.
Mr Edafe said that one locally made cut-to-size gun with six live cartridges and two expanded cartridges were recovered.
The police image maker said the suspects are currently in custody while effort is on to arrest the other members of the syndicate.
Mr Edafe said that the hoodlums were nabbed on Sunday by a combined team of the police State Anti-Cult Unit (SACU) and local vigilantes.
The PA was a butcher before approaching the deceased, asking to be taught film production.
Police investigation revealed that the vehicle was earlier snatched from the owner on the Ughelli-Warri Road.
Mr Edafe said the trio were shot on Thursday by police operatives attached to the Ozoro Division in Isoko North and Orogun Division.
