Assam minister Himanta Biswa Sarma has claimed that around 400 BJP workers and their families have fled Bengal and crossed into Assam amid post-poll violence in the state. At least 12 people have died over the last two days in violence that flared up in parts of Bengal. "In a sad development 300-400 @BJP4Bengal karyakartas and family members have crossed over to Dhubri in Assam after confronted with brazen persecution & violence," Sarma tweeted. The BJP has alleged that Trinamool Congress supporters have killed its workers, attacked women members, vandalised houses and party offices. The Trinamool Congress has claimed the BJP is responsible for the violence.