TAIPEI (Taiwan News) — Taiwan's Central Epidemic Command Center (CECC) announced Sunday afternoon (Sept. 13) that a Taiwanese woman who died in Kaohsiung Saturday after arriving from China on Aug. 30 had tested negative for COVID-19, according to CNA.

Earlier, the news agency had reported that local health personnel were skeptical COVID-19 was the cause of death for the woman, surnamed Song (宋).

Song, 53, resided in northern Taiwan, but as she was required to undergo a 14-day quarantine after arriving in Kaohsiung, she chose to stay at her brother’s house in the city’s Meinong District, CNA reported. She was found dead there Saturday — just one day before completing the isolation period.

Song had been working in China as a medical professional. The Meinong police station said that her death was at first presumed to be related to the coronavirus.

However, the Meinong Health Office, which was in contact with Song during her quarantine, said they suspected the cause to be connected to blood sugar levels, as she had been treated for diabetes.

Police have asked medical examiners to perform an autopsy on Monday.