Journalists and civil society activists were questioned by army officers on Sunday over news reports published on Saturday that army officers were seen to be collecting information from households and businesses in Mullaitivu district.
Army officers demanded to know how news of their activities had reached the press.
The latest army inquiries come as residents remain in fear over the collection of personal details from households and shops in Udayarkaddu, Suthanthirapuram, Kaiveli, Redbaana and Maanikkapuram.
Soldiers also visited shops and businesses in the area seeking details of owners and employees.
Mullaitivu district remains deeply militarised despite the passing of over 9 years since the end of the armed conflict.
A report by the Adayaalam Centre for Policy Research (ACPR) and People for Equality and Relief in Lanka (PEARL) published at the end of last year found that there is at least one Sri Lankan soldier for every two civilians living in Mullaitivu.