Without Pakistan and the Taliban at the table, most observers believe conference on Afghanistan will have little impact.
A series of explosions have been heard in a western suburb of Kabul, the Afghan capital, after a police station was targeted by attackers.
A gunfight took place in the area, known as District Five, following the initial explosions.
Police told Al Jazeera that a man launched a grenade attack on the police station, though initial reports quoted police as saying a “suicide attack” had taken place.
Loud gunfire was heard for about 15 minutes after the explosion, Al Jazeera’s Bernard Smith reported from Kabul, and sporadic gunfire followed.
The man fled after the firefight, police told Al Jazeera.
“Some terrorists have attacked the fifth district police station. There has been one explosion,” Hashmat Stanikzai, a police spokesperson, told the AFP news agency.
Stanikzai said no injuries had been reported after the attack.
The area where the attack took place is a densely populated residential zone which is not as secure as other parts of the Afghan capital, as it is at a distance from the city centre.
Zabihullah Mujahid, a Taliban spokesperson, said that a group of suicide bombers had carried out the attack.