Ouagadougou - More than 30 000 Malian refugees who have fled conflict for neighbouring Burkina Faso face severe food shortages, the UN's World Food Programme (WFP) and High Commissioner for Refugees (UNHCR) warned Tuesday."The WFP urgently needs $2.5m to provide the assistance the Malians need to survive," said Jean-Charles Dei, the organisation's country director in Burkina Faso."If the new contributions are not received as a matter of urgency then 31 000 Malian refugees risk being deprived of food assistance over the coming three months," the WFP and UNHCR said in a statement."The approaching dry season is the time when they are particularly vulnerable and most require support," added the agencies, who have helping the Burkinabe government and NGOs deal with the refugee flow since 2012.Ealier this month, the WFP said a funding gap late last year had forced it to interrupt food assistance for a month and that food rations remain reduced, leading to one in four refugees not having enough food to meet their nutritional needs.Quite apart from the Malian influx exacerbating the need for food security, Burkina Faso is itself one of Africa's poorest countries. It ranks fourth bottom on the UN Development Programme's (UNDP's) Human Development Index in 2013 with 44.6% of the population living on less than $1.25 per day.The WFP has previously highlighted that 8.2% of Burkinabe children aged five or less suffer from moderate or severe acute malnutrition.Jihadist violence"Malian refugees are already exposed to the damaging effects of recurrent drought, flood and chronic poverty," said UNHCR representative in Burkina Faso Gogo Hukportie.Hukportie warned that without international support there was a risk that young people could resort to desperate measures, including joining armed groups, and forecast that the refugee problem would not be resolved quickly."To the extent that the situation in the north [of Mali] remains unstable, we expect few refugees to return to Mali in 2016," said Hukportie.Some 100 000 Malians in all have sought refuge across the border since 2012 as they flee jihadist violence.Mali's north fell under the control of Tuareg-led rebels and jihadist groups linked to al-Qaeda in 2012.Although the government and rebels reaching a landmark peace agreement last year UN Secretary-General Ban Ki-moon warned in a report this week that insecurity is spreading in northern and central regions.