Contaminants were found in Moderna Inc's COVID-19 vaccines at a large-scale vaccination center in Japan's Okinawa prefecture, NHK reported on Sunday.

The Okinawa vaccines are from different Moderna lots already suspended by the Japanese government due to reports of contamination, NHK said.

Black substances were spotted in syringes and a vial, while pink substances were found in a different syringe filled with vaccine at the Okinawa center, NHK said.