Sahebrao Gaikwad, an additionalcommissioner with the Pimpri Chinchwad Municipal Corporation (PCMC) died of heart attack on Thursday, a senior official said.Gaikwad was earlier posted as an additional collector at the Pune Collector's office."He suffered a massive heart attack at his house on Thursday and was taken to a private hospital where he was declared dead," the official said.Sources said that after he was transferred to PCMC recently, Gaikwad had approached the Maharashtra Administrative Tribunal and challenged his transfer.