COR RG RG RG IMPHAL: Security forces arrested three militants from different places in Manipur, police said today.Security forces arrested a cadre of proscribed outfit PLA in Thoubal district today, a release issued by the PRO of Manipur Police said.A cadre of PLA and a militant of the People Revolutionary Party of Kangleipak (PREPAK) were arrested in Imphal East district yesterday, the release added..