ZHENGZHOU - A high-schooler has been arrested on suspicion of contracting hitmen to kill his father and elder sister at their home in Central China's Henan province, the local municipal bureau of public security said on Monday.

Neighbors called police after hearing sounds of housebreakers in the residence of Gao Tianfeng, a member of the judicial committee of the Intermediate People's Court of Zhoukou city, at around 2 am on Sunday.

Police on Monday confirmed that Gao and his 20-year-old daughter were found dead in the house, and surveillance cameras in the estate showed two slim men had climbed over a boundary wall to enter the house before the time of the murder, and then retreated by the same route.

Police have arrested two of three suspects who allegedly conspired in the crime. One of the two was Gao's teenaged son, a high school student in Luohe city, which is about 70 km away from Zhoukou.

According to the police's interrogation of the boy, the junior hired two men that he got to know via the Internet to kill his father and elder sister, because "they had given him too much pressure in study".

The sister had been sent by Gao to accompany his son to study at the school.

The case is still under investigation.