A Home Ministry official, currently facing the CBI probe for illegally keeping files connected to activist Teesta Setalvad's organisation, has gone missing.

Anand Joshi, an under-secretary, has left a letter claiming he had "made enemies while serving the nation." The CBI was set to quiz Joshi on Wednesday but he failed to appear for the questioning. His family has filed a missing complaint with the police.

The officer came under CBI's radar after the recovery of documents linked to an inquiry into the foreign funding of NGOs like Ms Setalvad's Sabrang from his house.

Earlier this week, Joshi had claimed that his senior was putting pressure on him to give a clean chit to some NGOs served notices for the violation of the Foreign Contribution Regulation Act or FCRA, including the Ford Foundation.

Joshi's wife Minakshi Sharma says that she last saw him around 2 AM on Tuesday at their home in Indirapuram near Delhi. She apparently found a note from her husband when she woke up in the morning and saw that her husband was not at home. "When I woke up around 7:30 am, the main door was ajar and he wasn't there. I later found the note he left behind," she said.

In the Hindi note to his wife, Mr Joshi wrote: "I have been going through extremely high mental harassment for the past few months but now the situation has got out of hand. At this moment I need peace and that is not possible here. I am leaving home and please do not look for me. You are now both a father and a mother to our children."