OCHA says a multi-sector response has been launched o deal with the unfolding humanitarian situation, with around 107,000 people reached so far, inside and outside UN bases.
The UN is attempting to plus a $166 million shortfall in its $209 million response package needed to respond to humanitarian needs on the ground.
According to OCHA, armed clashes continued to be reported in Jonglei, Unity and Upper Nile states, with the security situation in the country remains calm but unpredictable in many areas, including Juba.
Despite a decrease in the numbers of civilians sheltering in UN bases in Malakal and Bor, OCHA says there have been continuous flows of people fleeing their homes over the past three days from multiple locations.
OCHA said large numbers of displaced people remain concentrated in Bentiu (8,000), Malakal (11,500) and Pariang (2,500).
It further said that it had serious protection concerns for civilians in conflict-affected areas, with credible reports of targeting civilians based on ethnicity and perceived political affiliation.
"This includes physical abuse such as killings, beatings, destruction and looting of property", the OCHA report said.
"Physical protection needs associated with civilians being caught in active combat crossfire is also of grave concern", the report adds.