The bomb exploded near the presidential palace and foreign embassies in the center of Kabul on Wednesday morning, Afghan officials said.
According to witnesses, dozens of cars were blocking roads and some wounded people could be seen.
No group has yet claimed responsibility for the attack. the precise target of which remains unclear, even though it hit Zanbaq Square, close to the German embassy.
Health ministry spokesman Ismael Kawoosi confirmed the fatality number and warned that the toll could rise.
"They are still bringing bodies and wounded people to hospitals,” he said.
An Interior Ministry spokesman Najib Danish said initial findings showed it had been a truck bomb. The attack inflicted damages on the buildings of embassies of India and Japan.
India’s envoy to Afghanistan, Manpreet Vohra, said the blast hit around 100 meters from India’s embassy "but we are all safe, all our staff, all our personnel are safe.”
He said that "the blast was very large and nearby buildings including our own building have considerable damage in terms of broken glass and shattered windows and blown doors etc.”
Indian Prime Minister Narendra Modi used Twitter to "strongly condemn the terrorist blast in Kabul.”
The blast also shattered windows at the Japanese embassy.
"Two Japanese embassy staffers were mildly injured, suffering cuts,” said a Foreign Ministry official in Tokyo.
German security sources, however, said it was unclear if any of their staff at embassy were injured or killed.
The bomb blast on the highly-secured area is said to be "one of the biggest” the city, which has already been the target of many terrorist attacks in the first three months of 2017.source: Press TV