A parked motorcycle, Ja 3 Pa 9438, was reduced to ashes in the arson at Nidhi’s house at Janakpur-1, Mills Area.
Protesters pulled down the compound wall and also pelted stones inside the house.
Nidhi’s sister-in-law Kiran Nidhi has sustained injuries in her hand, arm and back in the attack.
The mob also broke some half a dozen chairs at the premises of the house.
In charge of Railway Station Police Post Ayodhi Prasad Yadav said that police and neighbors doused the fire.
UML cadres clash with UDMF cadres; 2 held
Earlier on Sunday, at least eight people including four police personnel were injured when a clash was ensued between UDMF and police at Bharmapuri as the latter barred a group of UDMF cadres who tried to gherao NC leader Lila Koirala's house.