The Drug Enforcement Commission (DEC) has summoned Patriotic Front (PF) president Michael Sata again.
Last Thursday, the DEC questioned Sata in connection with a money-laundering investigation and recorded a statement from him.
The investigations border on a 100,000-dollar bank transfer at Finance Bank.
Informed sources have dsiclosed that Sata will be required at the DEC officers in the morning on Tuesday.
It is not yet clear if the police will charge and arrest him but sources say tomorrow anything is possible as investigations have reached a very advanced stage.