JTF spokesman Mustapha Anka told All Africa Global Media that 30 men armed with AK-47s in two speedboats took on its troops.
A soldier and two vessel operators were injured in the incident.
The JTF was raiding an illegal oil bunkering site at Okpoko Creek in Warri.
It seized nine boats loaded with stolen crude oil and impounded seven speedboats.
Five suspects were arrested.
