Suspended Corporate Affairs Ministry officer BK Bansal, being probed in a graft case, and his son Yogesh, committed suicide by hanging themselves from ceiling fans at their apartment, police said on Tuesday.

According to the police, Bansal, 60, and his 30-year-old son were found hanging in separate rooms by their maid Rachna in their flat on Tuesday morning in Neelkanth Apartments in east Delhi.

"The maid found them and raised an alarm. The neighbours then informed the police around 9 a.m.," Deputy Commissioner of Police Rishipal told IANS.

The officer also said: "They might have committed suicide late on Monday night or early Tuesday. The exact time can be confirmed only after the post-mortem report," 

The bodies have been sent to Lal Bahadur Shastri Hospital for the autopsy.

The police said that a suicide note was found.  According to the neighbours Bansal and his son were upset over the ongoing graft case and the recent deaths in the family.

Bansal's wife Satyabala, 57, and daughter Neha, 27, had also committed suicide on July 19 following interrogation by the Central Bureau of Investigation (CBI). 

Two suicide notes were found at that time.

Bansal, director general of the Ministry of Corporate Affairs, was arrested on July 16 on charges of receiving a bribe of Rs 9 lakh for extending favours to a corporate firm.

He was dealing with matters related to alleged violations by a Mumbai-based pharmaceutical company.

A Delhi court had granted bail to Bansal on August 30. According to sources, CBI had summoned him for further questioning on Wednesday.