Hawzah News Agency (Kabul, Afghanistan) - Afghan officials said the crimes were perpetrated in Nangarhar Province, on the border with Pakistan — where militants have established a stronghold — late on Saturday.
''They brutally beheaded three attendants and set fire to the school building,'' Mohammad Asif Shinwari, a spokesman for the Provincial Education Department said, adding that the administrative offices and the school library were completely burnt.
It was not clear if the victims were minors.
No group or individual has so far claimed responsibility for the acts of violence either.
In a statement, though, the provincial governor blamed the attacks on Daesh (or ISIS), which had warned last month of attacks on schools in Nangarhar.
Daesh has been responsible for a series of earlier brutal attacks in the eastern Afghan province and other areas, regularly beheading victims it accuses of cooperating with the government.
Since late last year, the Takfiri terrorist group, which has already lost all its urban strongholds in Syria and Iraq, has taken advantage of the chaos in Afghanistan and established a foothold in the Asian country's eastern and northern regions, launching brutal attacks against civilians and security forces alike.
According to Afghan intelligence documents, Daesh is present in nine provinces, from Nangarhar and Kunar in the east to Jawzjan, Faryab, and Badakhshan in the north, and Ghor in the central west.
In November last year, former Afghan president Hamid Karzai said the United States (US) was colluding with Daesh in Afghanistan and allowing the Takfiri group to flourish in the war-stricken country.
The US and its allies invaded Afghanistan and toppled a ruling Taliban regime some 17 years ago. The Taliban have been fighting ever since.
Daesh has gained a foothold in Afghanistan only recently.