The personnel went about their work on Thursday morning at the posts fortified with sacks of sand and soil, said BM Ashraf Ullah Taher, an additional deputy commissioner of Sylhet Metropolitan Police.
He said followers of the extremist groups destroyed public and private properties in attacks targeting government and private establishments in parts of the country for a few days.
Activists of the Islamist group Hifazat and some other groups carried out violence in several places of Chattogram and Brahmanbaria in protest against Indian Prime Minister Narendra Modi’s Mar 26-27 visit to join the celebrations of Bangabandhu’s birth centenary and the golden jubilee of Bangladesh’s independence.
Taher said additional police personnel have been deployed just in case.
Security at all 11 police stations in Sylhet district has been beefed up, said Farid Uddin, superintendent of police.