A suicide attacker detonated a car bomb in the western part of Kabul on Monday, killing at least 35 people, more than doubling earlier casualty estimates, CBC News quoted an Interior Ministry spokesman in the Afghan capital as saying.
Police cordoned off the area, located near the house of the deputy government Chief Executive Mohammad Mohaqiq in a part of the city where many of the mainly Shia Hazara community live, but they said the target of the attack was so far unclear.
Kabul police chief spokesperson Basir Mujahed says the bomber targeted a bus carrying employees of the mines and petroleum ministry.
"The bomber attacked at one of the busiest times of the day," Mujahed said. "There were traffic jams with people going to work and to the university and schools. Many of the shops had just opened." 
A bus was completely destroyed, along with three other cars and several shops in the area, he said, adding children were among the wounded. 
In a statement the Interior Ministry called the attack "a criminal act against humanity."
Acting Interior Ministry spokesperson Najib Danish said at least 24 people had been killed and 40 wounded but the casualty toll could rise further.
Another senior official, speaking on condition of anonymity because he was not authorized to talk about the incident with the media, said the toll stood at 35 killed. That was in line with a claim on Twitter by Taliban spokesman Zabihullah Mujahid, who said 37 "intelligence workers" had been killed. 
Mujahid said in a tweet claiming responsibility for the attack the target had been two buses that had been under surveillance for two months.
Salim Rasouli, director of the city's hospitals, said at least 13 dead and 17 wounded had been taken to hospitals.

Source: Mena