At least five people were shot and killed on Saturday evening in a small community a few kilometres (miles) from Nigeria's largest refinery in the oil hub Port Harcourt in Rivers state, a spokesman police and local leaders said on Sunday.
Gunmen on motorbikes rode around Agbonchia for about an hour shooting at people, youth leader Osaro Nwoke andSimeon Awaji, a local council official said.
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"We arrested 10 people today ... items recovered included a Lexus jeep, two motorcylces and ... ammunition," Mohammad said.
The delta region periodically sees kidnappings and shoot-outs between local gangs.