The Niger Delta Greenland Justice Mandate group said it carried out the attack on the Afiesere-Ekiugbo delivery line, in the town of Ughelli in Delta state, on Sunday night at around 11:30 p.m. (2230 GMT). The line is operated by NPDC, a unit of NNPC, and Nigerian energy company Shoreline.
It is the latest in a series of attacks on energy facilities in the restive region that have cut Nigeria's oil production by 700,000 bpd.
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