Initial reports suggested at least six commandos and 35 civilians were wounded in the truck bomb explosion.
The Afghan government has freed a total of 300 Taliban prisoners since April 8.
Dozens of people have been injured over the weekend.
An Afghan regional governor said 25 members of the country's elite commando units have been killed in fighting with the Taliban
"We're examining the miscommunication to ensure it is not repeated. We regret this tragic loss of life of our partners and are committed to improvement every day with every mission."
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