A suicide bomber was shot dead here on Monday while preparing to attack a blood donation camp, police said.
"The suicide bomber who arrived near the tent was identified by police and officers opened fire on him," Stanekzai said.
No group has claimed responsibility yet.
In recent months, insurgents and armed groups have carried out a number of attacks against medical personnel in Afghanistan.
Also in April, a suicide attack on a voter registration centre, claimed by the Islamic State, killed at least 57 people and injured around 120.
The biggest attack of the year took place in January when the Taliban used an ambulance as a car bomb, detonating it in a central district of Kabul, killing more than 100 people.
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