All district authorities have been directed to step up security and intensify patrolling to prevent further outbreak of violence, official sources said.
Kamrup district administration has imposed prohibitory orders across the district to prevent unlawful and disruptive activities by any insurgent outfits.
The order, issued by Additional District Magistrate Manik Chandra Sarma, prohibits gathering of more than five persons and carrying of arms and ammunition in public places.
The authorities have also prohibited taking out of processions, slogan shouting and use of loudspeakers in public places.
The order also prohibits pillion riding on two-wheelers, though patients on way to hospitals, security forces, people above the age of 65 years and children below 12 years have been exempted from the purview of the bandh.
The crude bomb was exploded by suspected militants in Dibrugarh town last evening, killing a teenage girl and injuring nine persons, including a woman.