A third explosion was heard in Afghanistan capital Kabul on Monday night, hours after two explosions that left at least 30 persons dead and over 90 wounded.
Blast was caused by a vehicle packed with explosives that was detonated, Khaama Press reported.
Three attackers were killed. No group has admitted to carrying out the attack, BBC reported.
Early on Tuesday, Ministry of Interior said that the target of Monday night's bombing in Kabul city appears to have been a charity by the name of CARE (Pamlarana), Tolo news reported.
Ministry spokesman Sediq Sediqqi said at least one civilian was killed and one other wounded.
He said organisation was targeted in a bombing and attackers then entered the building in Shar-e-Naw.
A government spokesman told the BBC that six other civilians were injured in the attack.
At least 42 persons were rescued during the operation, including 10 foreigners, he added.
"One terrorist detonated a car bomb at a building in Shar-e-Naw locality late Monday night. Several gunmen took position inside the stricken building... Afghan Special Operation Forces were clearing the area," the source told Xinhua news agency.