A pair of bombings near the Afghan Defense Ministry in Kabul killed at least 24 people on Monday, including two security force generals, The Associated Press reported.
The Taliban claimed credit for the attack, which wounded 91.
Interior Ministry spokesman Sediq Sediqqi said a district police chief and five other police officers were among those killed.
Deputy Defense Ministry spokesman Mohammad Radmanish said the second bombing was caused by a suicide attacker who struck the area of the first blast after security forces gathered there.
Radmanish said the attack took place as ministry employees were leaving their offices for the day. Senior police investigator Faredoon Obiadi said the suicide attacker was wearing a military uniform.
President Ashraf Ghani condemned the attack in a statement, saying "the enemies of Afghanistan have lost their ability to fight the Security and Defense Forces of the country and thus attack highways, cities, mosques, schools and common people."
Taliban spokesman Zabihullah Mujahid said his group had carried out the attack. The insurgents have been fighting to overthrow the U.S.-backed government for 15 years, and frequently target Afghan security forces, AP reported.