The deceased identified as Malka, wife of Sajil Ahmed who is posted as sub-inspector at Ghaziabad police station was shot dead yesterday.
A case has been registered against the accused identified as Mintu Pandit and Nitu Sharma and search is on to apprehend them. The cause behind the attack is being investigated, they said.
In another incident, a 13-year old boy was allegedly stabbed to death by unidentified miscreants in Titerwada village in Shamli district yesterday.
Meanwhile, another student Salim (20) was attacked with a sharp object by fellow student Qasim (22) in Kandhla town of the district, police said.
The accused has been arrested and further investigations are on in the case, they said.