Security forces along the Mizoram border. (file image).

Assam chief minister Sarbananda Sonowal has dashed off a letter to Union home minister Amit Shah on the tension with Mizoram after a person from the Cachar district died in custody in the neighbouring state.

Chief minister Sonowal expressed condolences over the death of Intazul Laskar, who was “abducted by the miscreants” from the Lailapur Border Outpost area of Cachar district along Assam- Mizoram border, said a statement issued from CMO on Monday.

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He also announced an ex-gratia of Rs 5 lakh to the next of kin of the deceased, it said.

“It may be noted that following the sequel of boundary rows along Assam-Mizoram border, chief minister Sonowal sent the details of the incidents to Union Home Minister Amit Shah today,” it added.

The statement, however, did not mention the contents of the letter to Shah.

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The Mizoram Police, however, has claimed that Laskar was a drug smuggler who was apprehended on Sunday evening when he crossed the border to deliver a consignment and he later died at a health facility, TOI reported.

Following the incident, Sonowal directed chief secretary Jishnu Barua and director-general of police Bhaskar Jyoti Mahanta to rush to the area and take stock of the situation.

“Chief minister Sonowal also talked to deputy commissioner, Cachar district Keerthi Jalli and took stock of the prevailing situation,” the statement mentioned.

Sonowal, while expressing concern over the boundary row, asked the police to remain alert and thwart all designs that have the potential to vitiate peace and order along the border, it added.

Tension has been prevailing along the border since October 17 after miscreants allegedly damaged 18 temporary huts and three semi-urban dwelling units, following which several rounds of talks were held between officials of Assam, Mizoram and the central government.

Protesters have blockaded the highway since Wednesday, six days after truck movement along the inter-state border resumed on October 22 following a Centre-brokered dialogue between Assam and Mizoram on October 21.

The protesters have refused to withdraw blockade until Mizoram remove forces from the border.