The Rapid Action Battalion (RAB) arrested the main suspect and his uncle in connection with the killing of Gaibandha-1 constituency lawmaker of the ruling Awami League Manzurul Islam Liton from the city`s Badda area early on Thursday.The arrestees are the main suspect, Ashraful Islam, son of Ameer of Sundarganj Thana uint Jamaat-e-Islami and his uncle Zahirul Islam.“We arrested the duo from Badda area early today,” a RAB official said, adding that they will be sent to Sundarganj Police station of Gaibandha district.Police earlier arrested six leaders and activists of Jamaat from different parts of Sundarganj.Unknown miscreants shot dead MP Liton at his home at Shahbaz in Sundarganj on December 31 last. A murder case was lodged to this end.Source: BSS