Former prime minister Dr Mahathir Mohamad has completed all necessary investigations for a medical check-up and will be ready to be discharged from the hospital within the next few days, the National Heart Institute said today.

"The team of doctors treating Dr Mahathir is satisfied with results of the investigations done over the last few days"

Mahathir was admitted to the hospital last Thursday for a full medical checkup and observation. The hospital did not say why he had been admitted.