The United Nations on Monday said the aid worker, Babagana Buba, who died of complications from COVID-19 in Borno State had no travel history outside the state.

The UN Resident Coordinator in Nigeria, Edward Kallon, in a statement, said efforts were being made to trace anyone the deceased might have come in contact with.

The aid worker, who was showing symptoms of COVID-19, died shortly after being admitted at the University of Maiduguri Teaching Hospital.

Kallon said, “He had no travel history outside of Borno State and made the ultimate sacrifice.”