He, therefore, called on all stakeholders to work together to bring peace and stability to the country.
Guterres said this in a statement by his spokesman, Stéphane Dujarric, on Monday.
He was reacting to the attacks recorded in Gwaska village in Kaduna State.
The statement read, “The Secretary-General strongly condemns the attack on 5 May 2018 in Gwaska village, Kaduna State, northwestern Nigeria, which resulted in scores of casualties.
“The Secretary-General expresses his deepest condolences to the bereaved families and to the Government and people of Nigeria, and wishes a speedy recovery to the injured.
“The Secretary-General calls for those responsible for this attack to be swiftly brought to justice.
“The Secretary-General also expresses his continued concern over the persisting violence and urges all actors to work together to bring peace and stability to the country.”
It will be recalled that the National Chairman of the Peoples Democratic Party, Uche Secondus, has sent a petition to Guterres accusing President Muhammadu Buhari of human rights violation.
Secondus has in the petition also accused Buhari of allegedly being behind the spate of herdsmen and farmer clashes in the middle belt of Nigeria.