International development banks are preparing a package of emergency loans for three West African countries hit by the deadly Ebola virus, bank officials said on Monday as African leaders gathered in Washington for a U.S.-hosted summit focusing on the region.

African Development Bank President Donald Kaberuka told Reuters the bank would immediately disburse funds to Liberia, Sierra Leone and Guinea, whose health systems have been stretched by the outbreak. The worst outbreak of Ebola ever has killed nearly 900 people since it began in February.

Bank officials said the funding was close to $60 million.

“These countries need structural support to build up their health systems” still recovering from years of conflict, Kaberuka said. “We have the science, we have the ability, and the means to contain this thing. I am confident of that,” he said.

The World Bank said  it would provide up to $200 million to Guinea, Liberia and Sierra Leone to help the West African nations contain a deadly Ebola outbreak.

World Bank president Jim Yong Kim, himself an expert on infectious diseases, said he has been monitoring the spread of the virus and was “deeply saddened” at how it was contributing to the breakdown of “already weak health systems in the three countries.”

“I am very worried that many more lives are at risk unless we can stop this Ebola epidemic in its tracks,” Kim said.

The funding will help provide medical supplies, pay medical staff and take care of other priorities to contain the epidemic and try to prevent future outbreaks, the World Bank said.

The death toll from the Ebola outbreak on Monday reached 887 after 61 more fatalities were recorded, according to the World Health Organization.

The World Bank made the announcement as African leaders including 35 presidents are visiting Washington for a US-Africa summit.

An initial estimate by the World Bank and IMF found that Guinea would lose one percentage point in Gross Domestic Product growth, dropping from 4.5 percent to 3.5 percent expansion in the year, due to the epidemic.

“We’re putting together a substantial emergency package for the three countries and will announce it early this week,” a bank official said, speaking on condition of anonymity.

The funding is part of a $100 million emergency response plan launched by the World Health Organization last week. WHO chief Margaret Chan said on Friday that Ebola was outpacing efforts to contain it and warned of “catastrophic” consequences if the situation deteriorated.

The United States will also provide more help to the affected countries and to international agencies responding to the outbreak, providing equipment and technical expertise, State Department spokeswoman Jen Psaki said on Monday.

Senior State Department officials were meeting with Guinean President Alpha Conde and representatives from Liberia, Sierra Leone and Nigeria on Monday to discuss U.S. support.

Liberia and Sierra Leone’s presidents canceled their plans to attend the summit to deal with the outbreak at home, although they have sent delegations to the meetings.

Nearly 50 African leaders are attending the economic, security and diplomatic summit through Wednesday.

.Updated with World Bank aid package to Ebola stricken West African nations