The Nigerian navy says it has rescued a hijacked oil tanker in a dramatic night operation in which one pirate was killed.

The Panama-flagged Maximus was escorted Monday into Lagos harbor. Rear Admiral Henry Babalola said it has four captured hijackers from Nigeria and Ghana as well as the crew of 18 from India, Pakistan, China, South Korea, Sudan and Ghana.

Babalola said the navy is still searching for two crew taken hostage by two hijackers who escaped in a pirate ship. The Indian defense attache said one is Indian and the other is believed to be Pakistani.

Babalola says the ship carrying 4,700 tons of diesel fuel was hijacked on Feb. 11 off the coast of Abidjan, Ivory Coast, and rescued Saturday night about 310 miles from Lagos.