Pro-Khalistan radical preacher Amritpal Singh's seven aides were released from the Dibrugarh Central Jail in Assam after the expiry of their NSA remand but were arrested again by the Punjab Police in a different case, officials said here on Wednesday. A 25-member team of the Punjab Police has been in Assam's Dibrugarh for the past several days to facilitate the transfer of Singh's seven accomplices, who have been imprisoned along with the Waris Punjab De (WPD) leader here for nearly two years. "Today, Kulwant Singh, Harjeet Singh and Gurinder Pal Singh were released as their detention period in the National Security Act (NSA) has expired," a senior official told PTI here. Following their release, the Punjab Police arrested them again and presented them before a court in Dibrugarh and sought transit remand, he added. In the last two days, four others were released from the Dibrugarh jail and arrested again in the same case. "All of them were produced before the court and have been