NAVI MUMBAI, April 30 -- Several leading traders and former office-bearers of the Agricultural Produce Market Commitee (APMC) at Vashi including the NCP (SP) Lok Sabha candidate from Satara, Shashikant Shinde, have been booked in criminal cases and arrested/ interrogated over the past week. The traders, supporters of Sharad Pawar, allege the cases have been foisted on them due to political vendetta, while Pawar has threatened a state-wide agitation if Shinde is arrested. But BJP leaders say the punitive action is the outcome of a long investigation, and more corruption is likely to be unearthed soon....