Both the parents have suffered 90 per cent burns and the seriously injured siblings were admitted to the ICU in Jorhat Medical College Hospital.
Investigations revealed that in the wee hours today the duo - Pinku and Sumi - set their house on fire at Dekorgorah Kamargoan when their parents Deben Dutta and Niku Dutta were asleep inside, Jorhat district Superintendent of Police Amanjit Kaur said.
The siblings then tried to cut their throat with a blade in an attempt to commit suicide, Kaur said.
Pinku, 30, is a masters degree holder and was working in Bangalore in a private firm until recently, while Sumi, 25, also a postgraduate is a Teachers Eligibility Test (TET) qualified teacher, she said.
Police investigations with locals and relatives revealed that since the last few days, there were frequent family tiffs between the parents and their children over some issues between the brother and sister.
