'Unknown' choppers carry Afghan militants to north

Afghan President Hamid Karzai says his administration is looking into reports of 'unknown' army helicopters carrying gunmen to the north of the country, amid increasing militancy in the area.

Karzai said investigations were underway to decide whether the reports are related to the mounting insurgency in the north, the BBC Persian reported. He added that authorities have received similar inquiries in the northwest as well.

Reports say the choppers were 'American.' Press TV has not been able to confirm these reports.

The issue has raised serious questions about the security in Afghanistan as analysts question the unprecedented growth of militants in northern parts of the country, despite of the presence of thousands of foreign forces in the south, who are tasked with keeping the militants at bay.

The Afghan president added that according to the reports, the helicopters have been taking gunmen to Baghlan, Kunduz and Samangan provinces overnight for about five months now.