World hunger spiked last year, worsened by a number of factors like global conflicts, climate change, and political crises, according to a new report from the Food and Agriculture Organization (FAO) of the United Nations.

In addition to a rise in chronic hunger, the number of undernourished human beings increased to an estimated 815 million in 2016 from 777 million in 2015, the UN report said.

"This sobering news comes in a year in which famine struck in parts of South Sudan for several months in 2017 and food insecurity situations at risk of turning into famines were identified in other conflict-affected countries, namely Nigeria, Somalia and Yemen," the FAO said.