All crew members of an oil tanker that was stormed by British naval special forces after a group of stowaways threatened violence are “safe and well,” the ship‘s operator confirmed Monday.

Seven people were detained in the raid, which unfolded in the English Channel after darkness fell on Sunday. Special Boat Service commandos were lowered by rope from helicopters onto the Nave Andromeda, whose crew had locked themselves in a secure part of the ship known as the citadel. Within minutes, the stowaways were in custody.

The Special Boat Service is the elite maritime counter-terrorism unit of the Royal Navy.

The Nave Andromeda oil tanker is docked next to the Queen Elizabeth II Cruise Terminal in Southampton, England, Monday, Oct. 26, 2020. The U.K. military seized control of the oil tanker that dropped anchor in the English Channel after reporting it had seven stowaways on board who had become violent. (Andrew MatthewsPA Wire via AP)

The Nave Andromeda oil tanker is docked next to the Queen Elizabeth II Cruise Terminal in Southampton, England, Monday, Oct. 26, 2020. The U.K. military seized control of the oil tanker that dropped anchor in the English Channel after reporting it had seven stowaways on board who had become violent. (Andrew MatthewsPA Wire via AP)

Navios Tanker Management, which operates the Liberian-registered vessel, said the ship’s master became “concerned for the safety of the crew due to the increasingly hostile behavior of the stowaways.” It said in a statement that all crew members were “safe and well.”

Maritime tracking websites showed the ship reached port in Southampton, on England’s south coast, early Monday.

The ship had left Lagos, Nigeria on Oct. 6 and had been due to dock in Southampton on Sunday morning. The raid followed a 10-hour standoff as the tanker circled an area a few miles southeast of the Isle of Wight, south of Southampton.

The Nave Andromeda oil tanker is docked next to the Queen Elizabeth II Cruise Terminal in Southampton, England, Monday, Oct. 26, 2020. The U.K. military seized control of the oil tanker that dropped anchor in the English Channel after reporting it had seven stowaways on board who had become violent. (Andrew MatthewsPA Wire via AP)

The Nave Andromeda oil tanker is docked next to the Queen Elizabeth II Cruise Terminal in Southampton, England, Monday, Oct. 26, 2020. The U.K. military seized control of the oil tanker that dropped anchor in the English Channel after reporting it had seven stowaways on board who had become violent. (Andrew MatthewsPA Wire via AP)

The coast guard scrambled helicopters to the scene, and authorities imposed a three-mile exclusion zone around the vessel. Suspecting a hijacking, Defense Secretary Ben Wallace and Home Secretary Priti Patel authorized military action, the U.K. government said.

“I commend the hard work of the armed forces and police to protect lives and secure the ship,″ Wallace said. “In dark skies and worsening weather, we should all be grateful for our brave personnel.″

The Nave Andromeda oil tanker is seen off the coast of the Isle of Wight, England Sunday, Oct. 25, 2020. The U.K. military seized control of the oil tanker that dropped anchor in the English Channel after reporting it had seven stowaways on board who had become violent. Police investigations will now continue, and initial reports confirmed the tanker's crew was safe and well. (Steve ParsonsPA via AP)

The Nave Andromeda oil tanker is seen off the coast of the Isle of Wight, England Sunday, Oct. 25, 2020. The U.K. military seized control of the oil tanker that dropped anchor in the English Channel after reporting it had seven stowaways on board who had become violent. Police investigations will now continue, and initial reports confirmed the tanker's crew was safe and well. (Steve ParsonsPA via AP)

 The Nave Andromeda oil tanker, right, is seen off the coast of the Isle of Wight, England Sunday, Oct. 25, 2020. The U.K. military seized control of the oil tanker that dropped anchor in the English Channel after reporting it had seven stowaways on board who had become violent. Police investigations will now continue, and initial reports confirmed the tanker's crew was safe and well. (Steve ParsonsPA via AP)

The Nave Andromeda oil tanker, right, is seen off the coast of the Isle of Wight, England Sunday, Oct. 25, 2020. The U.K. military seized control of the oil tanker that dropped anchor in the English Channel after reporting it had seven stowaways on board who had become violent. Police investigations will now continue, and initial reports confirmed the tanker's crew was safe and well. (Steve ParsonsPA via AP)