President Rodrigo Duterte's 68-year old sister, Jocelyn, vehemently denied allegations that her elder brother ordered the killing of a dance instructor who was reported to be her lover.

Reports of the alleged killing of Jocelyn’s lover surfaced when self-proclaimed assassin Edgar Matobato told members of the Senate Justice and Human Rights Committee that the Duterte, a Davao mayor then, told him and other henchmen to chop up the body of Jocelyn's boyfriend.

READ: Duterte ordered killing of sister’s lover, LTO fixer, claims witness

"That is a total lie. Malaking kasinungalingan yan," Jocelyn said.

Jocelyn admitted that she frequented ballroom clubs, but was quick to clarify that the allegations made by Matobato against the President were not true as "all her dance instructor friends are still alive and well."

She labelled the alleged expose as a "politically-motivated plot" masterminded by Senator Leila De Lima.

"I hold de Lima personally for that to have happened. Kung ikaw senator ka bago ka magharap ng witness pag-usapan muna ninyo. Because sa nangyari kanina, that's a big lie," she added.

"I don't like the idea na ako. I am not a politician. I hold her responsible," she added.

Matobato also earlier accused Duterte of ordering the killing of suspected criminals in Davao City during his reign as mayor.

Matobato, a former army militia, told a Senate hearing that he was recruited to a hit squad called the "Lambada Boys" alongside five others in 1988, when Duterte started his first term.

Under questioning by Sen. Leila de Lima, a staunch critic of Duterte's bloody war on drugs, Matobato said he killed around 50 people from 1988 to 2013.

"Ang trabaho po namin ay pumapatay ng kriminal kagaya ng [Our job is to kill criminals like] drug pusher, rapist, snatcher. Ganyan po ang pinapatay namin araw-araw [These are the people we kill everyday]," he said.

READ: Self-confessed death squad member tags Duterte in killings