A couple and their teen daughter were hacked to death, allegedly by their 20-year-old son, in Kaptanganj area of Azamgarh district, police said on Sunday.
The accused was absconding, Superintendent of Police Anurag Arya said.
The police said Rajan Singh of Dhandari village in Kaptanganj allegedly committed the triple murder after being reprimanded by his father a couple of days ago. Rajan Singh allegedly killed his father Bhanu Pratap Singh (45), mother Sunita Singh (42) and 13-year-old sister Rakhi Singh with an axe after they had gone to sleep on Saturday night, Arya said.
After receiving information about the triple murder, forensic and police teams with sniffer dogs reached the spot. The bodies were sent for post-mortem.
Arya said police teams were on the lookout for prime suspect Rajan Singh.
Meanwhile, a man was mauled to death by a pack of stray dogs in the premises of Aligarh Muslim University on Sunday morning, police said.
Safdar Ali, a resident of a locality adjoining the campus, was out on a morning walk in a garden at Sir Syed Museum when the dogs attacked him, police said.
Superintendent of Police (City) Kuldeep Singh Gunawat said that a police team rushed to the spot but by then the victim had died.
The body was sent for post-mortem and further action would follow, the SP (City) said.
There was no immediate response from the university regarding the incident.