Websites of more than 46 educational institutions based in the district were allegedly hacked by a group reportedly based in Pakistan, police said on Monday.
The incident took place on Saturday and came to light on Sunday.
Cyber Crime Branch has launched investigations after receiving complaints in this regard from Sant Gadgebaba Amravati University, P.R. Pote College of Engineering and Prof Ram Meghe Institute of Technology and Research, among others, they said.
Muslim Liberation Army (MLA), an obscure group said to be based in Lahore, allegedly hacked into these websites and posted objectionable material on them, police said.