Megastar Amitabh Bachchan, who is shooting for his upcoming film "TE3N" here, is upset with his Mumbai staff for not informing about his absence to his fans, who had gathered in front of his mansion for the Sunday meet-and-greet session.

The 73-year-old actor, who waves to his fans outside his residence Jalsa here every Sunday, was disappointed that his fans, who were waiting for him were left clueless about his whereabouts.

The actor calls it highly unethical and inefficient.

"Sunday! at Jalsa, Mumbai...I am not there...and they are there...I am embarrassed...this should not happen... staff at gate should tell them I am out of town... okay... some heads are going to roll... this is not ethical...or decent! Staff! Inefficient," Big B posted on his official blog.

Amitabh is caught up in the work of "TE3N", helmed by Ribhu Dasgupta and produced by Sujoy Ghosh, since the past few months. The film also features actors Nawazuddin Siddiqui and Vidya Balan.

The "Piku" star added: "Anyway...at work and now nearing the day when all shall be over here too... in Kolkata...feeling the absence already...the love the passion and the cheering... the connection and the respect that they give...so overwhelming... Thank you Kolkata... always the winner of hearts".