Soldiers, backed up by the air force and security officers, detained Isaac Romeo with two other men over the weekend in Calabar, the capital of Cross River state in the Delta region, the military said.
Authorities picked up a fourth man on Tuesday in Edo state, north of Delta state. He is thought to be responsible for an attack on a pipeline operated by the Nigerian Petroleum Development Company (NPDC) and Nigerian energy company Shoreline last month, the military added.
