Nearly 20 million Afghans out of a population of more than 35 million are facing acute food shortage.
He said religious leaders had asked for the gathering to address an Islamic system of government and economic and social issues.
An Afghan refugee was executed in Iran on Monday for the murder of two Shiite clerics earlier this year.
The report follows a decline in the country’s total imports and exports since the Taliban takeover in mid-August.
The 11 arrested include seven men and four women, who had entered Nepal through India.
The Boeing C-17 planes used by the U.S. air force often use the call sign “Reach” followed by a combination of numbers.