The explosion happened at about 6.15pm local time during a large gathering of people who were marking Prophet Mohammad’s birthday, officials said, TOLOnews reported.
The blast happened at the Uranus Wedding Hall, in the city, according to ministry of public health.
However, the Ministry of interior (MoI) said over 50 people were killed and wounded in the attack.
MoI Spokesman Najib Danish told TOLOnews that the blast was reportedly a suicide bombing.
One eyewitness, who was interviewed outside Kabul’s Emergency Hospital, said many people were wounded.
“There were a lot of wounded people, I saw at least ten wounded people brought here,” the eye witness said.
An hour after the explosions ambulances were still heard rushing to-and-from the scene of the explosion to hospitals in the city center.
The presidential palace immediately condemned the bombing and said it was a criminal act.
“President Ghani strongly condemns this criminal and Un-Islamic act and said that the terrorist attack on Milad un Nabi ceremony which conveys the message of peace and blessing is an enmity with the Islamic principles and way of life of the prophet (peace be upon him),” presidential palace (ARG) said in a statement.
The UN Assistance Mission in Afghanistan (UNAMA) has also deplored the attack.
UNAMA says it is outraged by Kabul bombing when communities across Afghanistan are marking a day of special religious significance.
“UNAMA outraged by #Kabul bombing when communities across #Afghanistan are marking day of special religious significance. Credible reports of heavy civilian casualties. UN human rights teams establishing facts. UN family extends deepest condolences to the many families affected,” UNAMA tweeted.