Transport services between Manipur and neighbouring states and within the state were also cancelled.
Irungbam Irabanta, a small-time businessman, was abducted from his house at Nongren in Imphal East district on May 27 by suspected Naga militants who demanded a ransom for his safe release.
Attendence in government offices was almost nil due to suspension of transport services, reports said, adding that security measures were tightened at vulnerable places to prevent any untoward incident.
Reports from the districts also said normal life was affected in hill districts with markets and business establishments remaining closed.
Representatives of the UCM, AMUCO and other social organisations recently met state home minister Gaikhangam demanding that the government find out the whereabouts of the kidnapped persons.