Can short-term hunger influence anger?
yes, hunger increase philogeneticaly older brain activity and supress prefrontal cortex...
so it could be anger or some other negative affect.

http://www.sciencedirect.com/science/article/pii/S0149763402000076

http://www.jneurosci.org/content/21/14/5304.short

http://psycnet.apa.org/journals/bul/126/6/890/