Security forces arrested four militants, including a top leader of a proscribed outfit from Imphal West and East districts, police said on Wednesday, PTI reported. Namgaklung Kamei @ November (42), a self-styled deputy chief of Zeliangrong United Front (J), a faction of ZUF underground outfit, was arrested from the vicinity of Kekrupat in Imphal West district on Tuesday. One 9mm pistol along with a magazine, was recovered from his possession, they said.