But officials in Logar earlier told the BBC that elders had seen the hostages.
Afghan officials say that 18 civilians were killed by a Nato air strike in Logar province.
Mr. Zarghun said the bomber was an Afghan man from the province of Logar, just south of Kabul.
Logar deputy police chief Rais Khan Abdul Rahimzai said the helicopter is owned by a company named Khaorasan.
In July, a Logar worker unearthed a landmine that exploded in his face.
I'm setting off to walk the circular path up the Logar Valley, one of the three that make up Solcavsko.
The award of a 30-year contract to a Chinese consortium to exploit the Aynak copper mine in Logar province came under particular criticism.
Up to 11 people, thought to include eight Turks, two Russians and an Afghan were taken in Logar province after their helicopter landed in bad weather.
Afghan officials said on Monday that a chartered helicopter had been forced down by bad weather in the Mangal valley, an isolated area of Logar province south of Kabul.
They believe it is by disrupting the Haqqanis' supply and infiltration routes in the eastern provinces of Ghazni, Paktia, Wardak and Logar that the battle for Kabul will be won.
Seven Turks, two Russians and one Afghan were in a civilian helicopter was forced to land in bad weather in Azra district in Logar province, the aircraft's operator told the BBC.
The aircraft landed in strong winds and heavy rain on Sunday in a village in the Azra district of Logar province, southeast of Kabul and about 30 kilometers, or 20 miles, from the Pakistan border, said district governor Hamidullah Hamid.
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