The family of the man who died in police custody yesterday has lodged a police report urging for a second post-mortem and an independent investigation on his death.

"The report lodged by the brother today basically says that they're not satisfied (with the post-mortem)... they saw the (beating) marks.

"Therefore they want an independent police investigation to be carried out in this matter, for action to be taken against all police officers who were involved and also for a second post mortem to be allowed," said the family's lawyer N Surendran.