"The bombing of buildings, hospitals, and infrastructure is unacceptable. Those generals have no business, they have no reason to destroy a country that has been built painstakingly by the people of this continent, by our brothers and sisters in Sudan" said Ruto.
The head of state spoke in Nairobi during the launch of the State of Migration in East and Horn of Africa report.
He said there is no concrete reason for the fighting as the matters the both camps are agitating for can be resolved through dialogue.
Ruto said Kenya is committed to stopping the continent from sliding into military rule, an era, he said, belongs to the past.
"The continent is ready and we are prepared as the people of to build our democratic institutions, and to get the people to choose the governments they want. The era of military rule and dictatorship is behind us,'' he said.
Ruto is deeply engaged and has been mobilizing humanitarian access within troubled areas.
Earlier on he met the United Nations Deputy Secretary General, Amina Mohamed, and offered Lokichogio as one of the sites where humanitarian access can be airlifted for those in distress in Sudan.
Foreign Affairs PS Sing'oei Korir said the head of state is further scheduled to meet the UN boss Antonio Guterres who is in Nairobi for a visit and the Sudan crisis will be part of the talks' agenda.
Ruto's sentiments come as the fighting has entered the third week, with the United Nations estimating that more than 500 civilians have been killed.
The South Sudanese foreign ministry on Tuesday reported that it had obtained the consent of the two parties to the current conflict in Sudan to name their representatives for peace talks to be held at any place of their choice.