Why police officer burnt alive fellow female police officer?

ALAPPUZHA: A woman civil police officer in Kerala’s Alappuzha district has died after she was set on fire this afternoon by a colleague who poured petrol on her. The policewoman was on her way back home from work.
Soumya Pushpakaran, 34, died on the spot. The accused, who is also a civil police officer, suffered 50 per cent burn injuries was taken into custody. He has been hospitalised and is in the ICU.
The victim was a mother to three children. The reason for the attack is yet to be ascertained, police said.
More details are awaited.