Senators and Members of the National Assembly (MNAs) have called for attention notices expressing grave concern over the mysterious disappearance of four Pakistani activists.
The matter about the disappearance of activists was discussed in the upper house.
Senate Chairman Raza Rabbani referred the matter to the Senate Standing Committee on Human Rights.
Separate calling attention notices were also submitted by PPP lawmakers in the National Assembly and the Senate expressing concern over law enforcement agencies inability to track down Salman Haider, who has been missing since Friday night.
They also called for a discussion on the issue.
The calling attention notice, moved by senators Sherry Rehman, Farhatullah Babar, Sassui Palijo and Rubina Khalid, called the attention of Interior Minister to the disappearance of the activists.
"To date law enforcement agencies have failed to provide answers regarding their whereabouts. This is a serious issue that merits a response from the Minister on the floor of the house," the Dawn quoted the notice, as saying.
Interior Minister Chaudhry Nisar Ali Khan has directed the concerned authorities to speed up efforts to find out Haider as soon as possible.
Various organisations are protesting in Pakistan for the release of abducted social media activists.