Cameroonian authorities detected two suspected cases of Marburg disease on Monday in Olamze, a commune on the border with Equatorial Guinea, the public health delegate for the region, Robert Mathurin Bidjang, said on Tuesday.

Equatorial Guinea officially declared its first outbreak of the Marburg virus, an illness similar to Ebola, on Monday.

Neighboring Cameroon had restricted movement along the border to avoid contagion following reports of an unknown, deadly hemorrhagic fever in Equatorial Guinea last week.

“On the 13th of February, we had two suspected cases. These are two 16-year-old children, a boy and a girl, who have no previous travel history to the affected areas in Equatorial Guinea,” Bidjang said at a meeting in Cameroon’s capital Yaounde.