West Bengal Chief Minister Mamata Banerjee on Friday suggested the "possibility" of EVM tampering and urged the Election Commission to call an all-party meeting to discuss the issue."I have seen the Election Commission's version that says nothing (no instances of tampering with the EVMs) is there. But I have also seen a version of BJP leader Subramanian Swamy where he said EVMs can be tampered (with)," Banerjee said."Whether they accept it or not is up to them. But I think the Election Commission may call an all-party meeting. Let this be discussed," she said.Earlier, Bahujan Samajwadi Party chief Mayawati alleged the EVMs were "managed" in the Uttar Pradesh assembly elections to ensure a BJP win. Delhi Chief Minister Arvind Kejriwal too said EVMs were tampered with in Punjab, with 20-25 per cent of AAP votes getting transferred to the Akali Dal-BJP alliance to prop up the Congress.Playing Swamy's video clip wherein the BJP Rajya Sabha MP talked of the possibility of EVMs tampering, the West Bengal Chief Minister said she herself was not implying anything but only quoting a "member of the BJP" on the issue."He said Japan is making a software for EVMs but they don't use it. Even America does not use it. Germany has stopped using it after a recent court order," she said.