The Yemeni government demanded the United Nations Security Council to take immediate action toward the war crimes committed by the Houthi militants in the southern province of Taiz.
In a letter to the UN quoted by the Saba news agency on Thursday, the government criticized slowness in responding to war crimes and violations of the laws of war in Yemen.
"The war crimes in Taiz are a sign the Houthis and their ally, the General People's Congress, are not serious in taking UN peace efforts," it said.
The government and the Houthi militants are preparing for UN-brokered talks in Geneva.
The letter came a day after 22 civilians including children were killed and dozens injured in Houthi rocket attacks on populated areas in Taiz.
Medics said the provincial hospitals lack medicines and equipment a problem that adds to the suffering in the city.
In addition to hysterical shelling killing many civilians, the Houthis has been imposing a siege around Taiz which has been preventing commodities from reaching the people for months.
The siege was a war tactic after battles between the government forces backed by the popular resistance and the Saudi-led coalition and the militants.
People are suffering from harsh conditions as the siege and battles have left the city without water, food and other supplies.