A total of 644 militants of eight banned insurgent outfits surrendered in Assam on Thursday along with 177 arms, police said. The members of the insurgent groups ULFA (I), NDFB, RNLF, KLO, CPI (Maoist), NSLA, ADF and NLFB surrendered in presence of Assam Chief Minister Sarbananda Sonowal at a programme. This is an important day for the state and the Assam Police.