A tennis ball which was found in the Bogambara prison in Kandy today was filled with heroin packets.
The authorities said that the ball had been thrown into the prison by an agent believed to be involved in supplying heroin to the prison inmates.
Investigations revealed that the inmate at the prison who was supposed to the collect the tennis ball had not been in the vicinity where the ball fell.
Another prisoner had seen the ball and picked it up and handed it over to the prison authorities.
The prison authorities cut open the ball and found 196 heroin packets worth over Rs. 58,000.
Further investigations are underway.