A gang, posing as IT officials, some in khaki uniform, had entered the house of a cotton trader at Singanallur in the city on October five last year.
Under the pretext of raid and seizure of unaccounted money, they had taken a box containing the gold jewellery and cash.
Five persons were arrested in this connection.
Mohamemd Rizvan of Krishnagiri and Krishnan of Paramakudi were detained under Goondas Act on January 31 while three others--Paramwshwaran of Uppilipalayam, Loganathan of Selvapuram (both in the city) and Saleem of Somanur on the outskirts-- were served the detention orders last night at the Central Jail, police said.