Arsonists stormed the home of Nyakach MP Aduma Owuor Saturday night and torched his vehicle and a store.
Kisumu County police boss Joseph Keitany said they had launched investigations into the mid-night incident.
"They burnt the MPs Pajero [car] and we are yet to confirm the reasons behind the attack," Mr Keitany said.
The police boss said they were investigating whether the incident could have been a revenge attack following last week’s suicide of Nyabondo Primary School headteacher George Omondi.
Mr Omondi is said to have left a suicide note allegedly linking the MP and other officials to his frustrations leading to his death.