M Ramulu allegedly axed his two children to death at his house in Taglapalli village.
A 35-year-old man allegedly committed suicide before "killing" his two minor children in Nizamabad district of Telangana, police said.
M Ramulu allegedly axed his nine-year old son and six-year-old daughter to death at his house in Taglapalli village under Varni Police Station before hanging himself to death on Wednesday, Sub-Inspector Anjaiah said.
Preliminary investigation suggests Mr Ramulu was suffering from psychological problems, the police official added.
A case has been registered and further investigation is on.