Kathmandu, July 3 -- Three people are under investigation for their alleged role in the death of Bimala Tamang, a sanitation worker at Smata Hospital in Bouddha, Kathmandu, last month.

The 27-year-old was found hanging inside the hospital on June 18.

Tamang had left behind a note, incriminating Tirtha Kumari Shrestha, Sangita KC and Kala Adhikari Sanjel, whom she had referred as "ma'am".

Kala Adhikari Sanjel is the wife of the hospital operator, Uttam Sanjel. Shrestha and KC are employees at the hospital. Based on the note, Tamang's family had filed a police complaint against the trio on June 20.

"We are investigating if there were any circumstances created by the suspects or other individuals which provoked Tamang to commit suicide," s...