Bollywood megastar Amitabh Bachchan, who filed a police complaint against an unknown person who had been sending derogatory and abusive messages on his blog and mobile phone, revealed Monday that the police is investigating the matter.

"The Police has been informed of this grave and insidious act and many of the level of commissioner and equal rank who are personal friends have been wanting to seek more information, have been incensed and are in action.

"Soon there shall be a sharing of details, not just in India but in the country of its origin," Bachchan posted on his blog.

Ever since the news was made public Sunday, the 67-year-old received many supportive messages from friends and well-wishers.

"The media picked up our blog of yesterday (Saturday) and spread it out into the world of information and now for the entire day there has been a barrage of messages of support, of wanting to catch the culprits and take them to task, of grave indignation and of being incensed by this show of absolute garbage that has been directed towards me," he wrote.

The actor said he will never spare anyone who talks ill about his family.

"There is a limit to which this can be tolerated. I can be a gentleman up to a point. But beyond that I shall stop being one. You go to the level of so much as touching my family and little innocent grand children and you shall have to pay extremely dearly," he posted.