Human Rights Watch and the International Commission of Jurists said in a joint letter to the Pakistani government today.
"After a five-year unofficial moratorium on executions, Pakistan's new government has said it intends to resume the heinous practice of sending people to the gallows," said Ali Dayan Hasan, Pakistan director at Human Rights Watch.
"The government should instead declare an official moratorium, commute all existing death sentences, and then abolish the death penalty once and for all," he said.
Pakistan should also ratify the Second Optional Protocol to the International Covenant on Civil and Political Rights on the abolition of the death penalty, according to the groups.
More From This Section
"A return to executions will derail one of democratic Pakistan's most tangible human rights successes," said Sam Zarifi, Asia-Pacific director, International Commission of Jurists.
"Under military rule, Pakistan endured the widespread application of the death penalty. The new government should demonstrate its clear opposition to any use of this ghastly punishment," he said.
A counter-terrorism court in Sindh province has issued 'black warrants' for the execution of two members of the banned Lashkar-e-Jhangvi, Attaullah alias Qasim and Muhammad Azam alias Sharif.
The two men were convicted by a counter-terrorism court in July 2004 for killing a Shia doctor and are scheduled to be executed between August 20-22 this year.
"It is absolutely essential that militants who threaten and kill people be held accountable for their crimes. However, terrorism won't be stopped by hangings but by rights- respecting counter-terrorism measures and fair prosecutions," Hasan said.
A majority of countries in the world have abolished the practice.
On December 18, 2007, the United Nations General Assembly passed a resolution by a wide margin calling for a worldwide moratorium on death penalty.