The delegation includes TMC MPs Derek O'Brien, Mamata Bala Thakur, Nadimul Haq and Member of Legislative Assembly (MLA) Mahua Moitra arrived at Dibrugarh.
The emergence of the ULFA on social media platform can be new challenge for the police and security agencies in the state.
Killings targeting a community are not new in Assam. Hindi-speaking labourers, Adivasis and Bengali Muslims have been the targets of militants in the past.
Singh was addressing a programme here titled 'Sankalp se Siddhi - New India Movement (2017-2022) Naye Bharat kaa nirmaan'.
Five Bengali-speaking workers were killed in Assam’s Tinsukia district, allegedly by ULFA(Independent).
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