NEW DELHI: Congress on Wednesday alleged that a few corporate houses sponsored 70 odd trips that Prime minister Narendra Modi undertook as chief minister of Gujarat in chartered planes. The cost of these trips came to Rs 16.56 crore.Questioning the allegations levelled by defence minister Nirmala Sitharaman against Robert Vadra for taking air tickets from middleman Sanjay Bhandari , AICC spokesperson Abhishek Singhvi said these were based on partial and misleading leaks from the government to malign Vadra.Singhvi provided documents about Modi's travels from his Gujarat government days accessed through RTI applications.He said allegations against Vadra were an attempt to divert focus from allegations against BJP chief Amit Shah 's son.Singhvi said BJP government and defence ministry acquired planes through the same person -- Sanjay Bhandari -- and there were no charges of corruption against him, even though Vadra was being questioned for alleged links with Bhandari seven years ago. He said Bhandari's mysterious escape from India has also raised questions about the government.He said Vadra had a year ago said the emails about Bhandari paying for his tickets were manufactured.