NAIROBI, Kenya (AP) — Tanzania is rejecting suspicions that it might have covered up cases of the deadly Ebola virus, calling it a plot to show the country in a bad light.

The health minister’s comments on Thursday come after the World Health Organization issued an unusual statement saying Tanzania refused to share information and the United States and Britain issued travel warnings.

The minister says there were two suspected Ebola cases last month but the East African country determined they did not have the virus.

Global health officials asked Tanzania to share the results of its investigations but Health Minister Ummy Mwalimu asserts there is no need to submit a “negative sample” for further testing.

Countries with little or no experience testing for Ebola are asked to send samples to a WHO-accredited lab.