Shell workers at Nigeria's Bonga oil field in the southern Niger Delta are being evacuated following a militant threat, a senior labour union official said on Monday.
"We are aware of the development and the evacuation is being done in categories of workers and cadres," Cogent Ojobor, chairman of the Warri branch of the Nupeng oil labour union, said. "My members are yet to be evacuated."
He gave no numbers.
Shell said earlier on Monday that oil output was continuing at its oil fields in Nigeria despite local media reports of a militant attack near its Bonga facilities. [nL5N18621V]
"Our operations at Bonga are continuing," a spokesman for Shell Nigeria Exploration and Production Company (SNEPCo) said in a statement. It said it would continue to monitor the security situation in its operating areas and take all possible steps to ensure the safety of staff and contractors.
Last week, militants attacked a Chevron platform in the Delta where tensions have been building up since authorities issued an arrest warrant in January for a former militant leader on corruption charges.
President Muhammadu Buhari has said there would be a crack down on "vandals and saboteurs" in the Delta region, which produces most of the country's oil.
A group known as the Niger Delta Avengers claimedresponsibility for the Chevron attack. The same group has said it carried out an attack on a Shell oil pipeline in February which shut down the 250,000 barrel-a-day Forcados export terminal.
Residents in the Delta have been demanding a greater share of oil revenues. Crude oil sales account for around 70 percent of national income in Nigeria but there has not been much development in the poor Delta region. Buhari has extended a multi-million dollar amnesty signedwith militants in 2009 but upset them by ending generouspipeline protection contracts.
The militancy is a further challenge for a government facedwith an insurgency by the Islamist militant Boko Haram group inthe northeast and violent clashes between armed nomadic herdsmenand locals over land use in various parts of the country.