The incident which occurred late Tuesday was the the first attack on a pipeline in the south-west under President Muhammadu Buhari administration.
The suspects in Ogun were said to have attacked the facility while pretending to be officials of the Nigerian National Petroleum Corporation (NNPC) on maintenance patrol.
The affected pipeline is said to serve an 11.4 distribution line for some companies in Ikorodu, Lagos state.
The scene of the attack has been cordoned off by security personnel.
The divisional police officer (DPO) of Ogijo police station, Mohammed Tijani said investigations were ongoing.
“What we heard is that during the day, some people disguised as NNPC staff. They reportedly came with two Hilux vehicles and pretended as if they carried out some repairs,” he said.
“Later at night, the explosion occurred.”
The group resumed hostilities some weeks back, accusing the government of insincerity after President Muhammadu Buhari appealed to them to give peace a chance.