The family of a trio killed in Sindh's Mehar area arrived in Islamabad on Tuesday, demanding the arrest of Pakistan People's Party MPA Nawab Sardar Ahmed Chandio.

"Three of our people were killed on Sardar Chandio's say-so," the deceased's family alleged. "He should be arrested."

They staged a protest outside the press club, and asked the Supreme Court and chief justice to take notice of the matter.

The protesters tried to meet the Leader of the Opposition Khursheed Shah, who was also present at the press club, but the PPP politician's security did not let them through.

On January 17, armed assailants had attacked the house of Raees Karamullah Chandio, the chairman of Baldai union council, killing him and his two sons, Mukhtiar and Qabil (a district council member).

Read: Slain UC chairman’s son tells investigators MPA’s brother led attack killing his father, two brothers

Chandio, his sibling Nawab Burhan Chandio and five other suspects were booked for their alleged involvement in the deadly incident, however, the MPA and his brother's names were later struck down from the First Information Report citing a lack of evidence.

The FIR had been registered after great efforts by the bereaved family as both the victims and suspects belonged to the PPP, due to which the Mehar police and Dadu district police had appeared reluctant to make any arrests.

Area people and some Chandio tribesmen had attributed the clash to an old land dispute between the two sides.