Suspended Bharatiya Janata Party MP Babubhai Katara, who was remanded to 11 days days in police custody on Thursday, had taken a woman abroad on his wife's diplomatic passport once earlier out of his two visits to foreign countries, police said.

The 46-year-old MP, who was arrested on Wednesday, when he was about to board an Air India flight to Toronto along with a woman and a teenaged boy on the passports of his wife and son, kept silent when a local court asked him whether he had taken anybody with him on his two earlier visits.

Additional Chief Metropolitan Magistrate Kamini Lau gave police 11 days custody of the MP after the investigating officer said he had taken a woman on his wife's passport to a foreign country and that they need time to unravel the case.

Police plan to take the MP to several places in Punjab and Gujarat as part of the investigation.

It has also found out that some of the arrival entries in his wife's passport were forged.

Police said they have seized three passports belonging to his family members from the MP from Dahod and did not rule out the possibility of some of these being forged.

The lawmaker said he had travelled to the UK and Canada in the past.

The court remanded Paramjeet Kaur, who was arrested for trying to travel on Katara's wife's passport, to five days in police custody. She told the court that the 15-year-old boy, who was also arrested on Wednesday, was not her son.

The teenager was produced in a juvenile court, which remanded him to 14 days judicial custody.