British police have arrested a couple on suspicion of holding three women captive for more than 30 years, Scotland Yard announced Thursday.

Officers from the Human Trafficking Unit arrested the man and woman, both 67, at their south London home as part of an investigation into slavery and domestic servitude, the Metropolitan Police said. They are in custody.

The "highly traumatized" victims - a 69-year-old Malaysian woman, 57-year-old Irish woman and 30-year-old Briton - have been taken to a place of safety, the Metropolitan Police said in a statement.