Yemen’s Saudi-backed government on Thursday reported the first cases of novel coronavirus in the southern province of Al Dhalea, underlining fears that the infection had found a foothold in the war-torn country.

The government’s coronavirus committee said on Twitter seven more cases has been confirmed in the port city of Aden where it is based and that Al Dhalea had recorded its first three infections, bringing the total in areas under its control to 85 cases with 12 deaths.

The Arabian Peninsula country is divided between the Saudi-backed government in the south and the Iran-aligned Houthi movement that controls the capital, Sanaa, and most large urban centres.

Houthi authorities have reported only two cases with one death, both in Sanaa.

The World Health Organization (WHO) said on Monday that the virus “has been circulating undetected and unmitigated in Yemen for some weeks”, increasing the likelihood that a surge in infections could overwhelm its shattered health system.

Four sources familiar with the matter told Reuters that Yemen has more suspected coronavirus cases and deaths than authorities have so far reported. The first case was announced on April 10.