WASHINGTON (AP) — Vice President Joe Biden has been talking with several African leaders on topics ranging from economic cooperation to security during the summit meeting aimed at strengthening U.S. ties with Africa.

Biden met with President Moncef Marzouki of Tunisia, President Goodluck Jonathan of Nigeria and President Jacob Zuma of South Africa on Tuesday during the conference.

Biden thanked Marzouki for Tunisia’s assistance in relocating U.S. personnel from Libya and offered his condolences for Tunisian soldiers who died fighting terrorists on July 16. Biden and Nigeria’s Jonathan agreed their countries would work together to contain the outbreak of the Ebola virus and talked of the need to contain the terrorist group Boko Haram. And he talked to the leaders about their economic ties with the U.S.

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