Chennai, June 05: Tamil Nadu Chief Minister Jayalalithaa has called off her press conference scheduled for today, the second such cancellation in last three days. Though the official announcement did not give any reason for the cancellation, it is understood "heavy workload" forced her to call off the interaction with the media. Jayalalithaa was to have addressed a press conference on Tuesday, but it was also cancelled at the eleventh hour. Formal press conferences by Jayalalithaa are a rare event and she meets the journalists occasionally on the sidelines of some functions or while returning home after a day's work at the secretariat. Bureau Report