The attacker detonated the bomb after soldiers and intelligence officers stopped him at a checkpoint, said Najib Danish, a spokesman for the Interior Ministry.
At least 23 Afghan soldiers were killed on Saturday in the Bala Boluk district of western Farah province when Taliban fighters stormed an army checkpoint.
"He did an fantastic job, sacrificed his life to save others by embracing the bomber before he could detonate the explosives", Najib Danesh said, adding that another intelligence official also was among those killed.
The Taliban, which has increased their violent attacks across the country, claimed responsibility for the attack.More news: What to expect out of Lonzo Ball's return on Friday
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Those provinces will soon see a natural gas pipeline cut through the region, connecting Afghanistan to Turkmenistan, Pakistan and India. The place of incident is also not far from the US Embassy.
"Around 08:20 am local time a suicide bombing in Kabul in PD9, in Shashdarak area, killed one and wounded six others", Danish said initially. "I saw several wounded people on the street near me", a witness told Tolonews TV adding that security forces had since swarmed the area, closing off the main road leading to the attack site.
Omar Zwak, spokesman for the provincial governor in Helmand, said a auto bomber early Saturday was shot by Afghan army soldiers but his vehicle managed to reach the entrance of the army base in Nad Aali district, killing two soldiers and wounding another.
The Islamic State group, which is trying to make inroads in Afghanistan, claimed the responsibility for the Kabul attack. Unfortunately, we lost 18 soldiers; two soldiers were wounded. Spokesman for the provincial governor in Helmand province, Omar Zwak, said one security person was killed and seven civilians injured in another suicide bomb attack near another military base in Helmand's capital city Lashkar Gah today.