A Delhi court today summoned RJD chief Lalu Prasad Yadav, his wife Rabri Devi and son Tejashwi Yadav and others as accused in the Indian Railway Catering and Tourism Corporation (IRCTC) scam. Special Judge Arvind Kumar directed them to appear before the court on August 31 in a case related to alleged irregularities in granting operational contract of two IRCTC hotels to a private firm.