Production is primarily done using components from existing stocks, several sources in the US and the Middle East tell the newspaper.
Assembly is less extensive than before the war, due to damage to the country's industrial facilities and the US blockade of Iranian ports.
A US source tells the newspaper that Iran likely resumed small-scale production after reaching a memorandum of understanding with the US and President Donald Trump in mid-June.
Intelligence reports suggest activity is underway at several underground facilities, including in Khojir, just east of Tehran. The information clouds US and Israeli claims that Iran's robotics industry is virtually wiped out.
