Johannesburg - Six men have been arrested for robbing a Bangladeshi shop owner and holding him hostage for seven days in Wonderkop, Marikana, North West police said.The 22-year-old had been robbed of an undisclosed amount of cash last week Thursday on December 31 at his supermarket in Welgeval, Mogwase, spokesperson Captain Paul Ramaloko said."The six allegedly kept the victim for seven days at a house in Wonderkop and demanded ransom of R500 000 for his release."Yesterday, the victim managed to escape from his kidnappers and approached community members to seek help. The community called the police for help," Ramaloko said.Officers patrolling the area responded to the call and found the man with his hands still tied with cable-ties, surrounded by a few community members and relatives.Two South African men and four Bangladeshi national were implicated in the crime.The four Bangladeshi nationals were allegedly assaulted by an angry mob after the victim explained what had happened. They were taken to a local hospital where they were currently under police guard, Ramaloko said.The two South African men were arrested on the scene and were due to appear in the Mankwe Magistrate's Court on Monday on charges of kidnapping, and robbery.