Kolkata, 26/1: Congress Lok Sabha leader and West Bengal unit president Adhir Ranjan Chowdhury on Friday apologised to Trinamool Congress Rajya Sabha floor leader Derek O’Brien for calling him a “foreigner” even as he alleged that the Mamata Banerjee-led government creating roadblocks for Rahul Gandhi’s Bharat Jodo Nyay Yatra in the state.