The Indo-Bhutan border in the Assam sector has been sealed following a bomb blast in neighbouring Bhutan.
"The Indo-Bhutan border has been sealed and there is additional deployment of the para-military force, Shastra Seema Bal (SSB), following the incident of blast", additional DGP of Assam BP Rao said.
He added that security has been tightened along the Indo-Bhutan border, including at Samdrup Jhongkar in Nalbari district, which is the entry point to the Himalayan kingdom.
When asked about any insurgent outfit behind the blast, Rao said preliminary reports point out the involvement of ULFA.
"But involvement of other outfits other than ULFA cannot be ruled out at this moment", he said.
The Assam police, he said, has taken all precautionary measures and are in touch with the BSF and SSB in this regard, Rao said.