The Ebola coordinator for North Kivu province, Dr. Aruna Abedi, told The Associated Press that the person in treatment is a suspected case. It was not immediately clear whether the person is a family member of the man who died on Wednesday. He had spent several days at home with his family while showing symptoms.
If this suspected case is confirmed, it could be the first transmission of Ebola in this outbreak inside Goma, a city of more than 2 million people on the Rwandan border.
The developments came as the outbreak that has killed more than 1,800 people entered its second year. It is now the second-deadliest Ebola outbreak in history and last month the World Health Organization declared it a rare global emergency.
WHO has recommended against travel restrictions amid the outbreak but says the risk of regional spread is "very high."
Rwanda's state minister for foreign affairs Olivier Nduhungirehe confirmed the border closure to The Associated Press on Thursday, a day after WHO officials had praised African nations for keeping their borders open. Last week Saudi Arabia stopped issuing visas to people from Congo while citing the Ebola outbreak, shortly before the annual hajj pilgrimage there this month.