KABUL — Afghan officials hanged six Taliban prisoners Sunday, a resumption of war-related executions that makes good on President Ashraf Ghani’s recent promise to deal harshly with insurgents now that hopes for peace negotiations have evaporated.

The six prisoners were hanged in the morning inside the Pul-i-Charkhi prison — a detention facility on the outskirts of Kabul that is notorious among Afghans as the site of massive executions by the country’s then-communist regime during the 1980s.

Among the inmates were two Taliban members who helped assassinate two senior government officials in recent years, officials said.

One prisoner facilitated a 2011 suicide bomb attack on Burhanuddin Rabbani, who served as temporary president in Afghanistan after US forces toppled the Taliban government 10 years earlier.

The second Taliban member was involved in the 2009 suicide bomb assassination of Abdullah Laghmani, the deputy chief of the country’s National Directorate of Security.

Ghani administration officials did not provide details about the other prisoners. But the Pul-i-Charkhi prison is where Anas Haqqani, son of Haqqani network founder Jalaluddin Haqqani, has been held since 2014.

Officials said all the executed prisoners had been found guilty of crimes against “civilian national security.’’

Ghani signed the order of execution in response to “repeated demands of the families of victims of terrorist attacks,’’ palace officials said in a statement.

The hangings come amid increasing concerns about security in Afghanistan. Taliban forces, aided by the increasingly influential Haqqani network, have vowed widespread attacks across Afghanistan on the heels of a robust spring poppy harvest — a main source of income for the insurgent group through the heroin black market.

Government officials, hopeful that the Taliban would enter into peace negotiations, had stopped executing captured prisoners during President Hamid Karzai’s administration.

But in the wake of a suicide bomb attack in Kabul last month that killed 64 people and wounded about 350, Ghani now says he is no longer interested in negotiating with Taliban leaders.

Taliban leaders have recently warned that it will respond to executions by killing government prisoners in their captivity. On Sunday, Taliban spokesman Zabihullah Mujahid said the group has yet to decide how to respond to the recent hangings.