The United Nations (UN) on Friday said it had received reports of at least 127 civilian casualties, out of which 25 were killed and 102 injured in the Ukraine crisis caused by shelling and airstrikes.

The UN rights agency, Office of the United Nations High Commissioner for Human Rights (OHCHR), said the number was very likely to be underestimated.

Two days since Russia launched military operations inside Ukraine, the UN rights office, OHCHR, confirmed that many civilians have already been killed and injured.

“We are gravely concerned about developments over the course of the day yesterday and overnight in Ukraine. We are receiving increasing reports of civilian casualties.

“Civilians are terrified of further escalation, with many attempting to flee their homes and others taking shelter where possible.

“As the High Commissioner has warned, the military action by the Russian Federation clearly violates international law. It puts at risk countless lives and it must be immediately halted,’’ OHCHR spokesperson.

“The High Commissioner stresses that states that fail to take all reasonable measures to settle their international disputes by peaceful means fall short of complying with their obligation to protect the right to life.

“We urge full respect for international humanitarian law and international human right law,’’ Ms Ravina Shamdasani said.

Shamdasani said the agency was disturbed by the multiple arbitrary arrests of demonstrators in Russia, who were protesting against war yesterday (Thursday).

“We understand more than 1,800 protesters were arrested. It is unclear whether some have now been released.

“Arresting individuals for exercising their rights to freedom of expression or of peaceful assembly constitutes an arbitrary deprivation of liberty.

“We call on the authorities to ensure the immediate release of all those arbitrarily detained for exercising these rights.

“Our UN Human Rights Monitoring Mission remains in Ukraine and will continue to closely monitor and report on the situation,” she said.