Days ahead of Union home minister Amit Shah's two-day visit to West Bengal, the Central Reserve Police Force (CRPF) has written a letter to the West Bengal DGP giving details of security lapses during the recent visit of BJP president JP Nadda. Sources privy of the letter told India Today TV that the CRPF has given a detailed account of the lapses made by the West Bengal Police when Nadda's convoy was attacked in Diamond Harbour. The CRPF, sources say, has sought cooperation from the West Bengal Police ahead of Amit Shah's visit to the state and has asked the local police to make proper arrangements for such protectees. Referring to the attack on JP Nadda's convoy, the CRPF has reportedly said adequate police deployment was not available. Amit Shah will be on a two-day visit to West Bengal this weekend. He will address a political rally and have lunch at a farmer's residence in Midnapore.