Former prime minister Dr Mahathir Mohamad was in close contact with a confirmed Covid-19 case, and now he has placed himself under self-quarantine.

Thursday would be 95-year-old's second day in quarantine and he has already been tested for the virus on Tuesday.

Mahathir is believed to have taken a picture with Bandar Kuching MP Dr Kelvin Yii, who has since been hospitalised at the Sarawak General Hospital after testing positive for the disease.