Four people have tested positive for Ebola in eastern Democratic Republic of Congo just days after another outbreak that killed 33 people in the northwest was declared over, the health ministry said on Wednesday. Twenty people have already died from hemorrhagic fevers in and around Mangina, a densely populated town about 30 km southwest of the city of Beni and 100 km from the Ugandan border, the ministry said in its statement, without saying when the deaths occurred, Reuters reported. A team of 12 experts from Congo’s health ministry were to arrive in Beni on Thursday to set up a mobile lab, the ministry said. The World Health Organization has started moving staff and supplies to the area, WHO chief Tedros Adhanom Ghebreyesus said. They head to a region where deep security problems could complicate efforts to contain the virus. About 1,000 civilians have been killed by armed groups and government soldiers around Beni since 2014, and the wider region of North Kivu holds over one million displaced people.