Sunil of Sonipat and Reena of Panipat allegedly committed suicide by consuming poisonous substance in their hotel room, said police.
According to the police, Sunil was already married and the girl accompanying him was his sister-in-law. An FIR in connection with their elopement was registered by Haryana Police last week.
On Wednesday morning, the couple checked into the hotel room. By 8.30 pm, when they did not come out, the hotel staff found the door was locked from inside.
Police broke open the door and found the couple dead. When they informed their Haryana counterparts, they came to know that an FIR was filed last week in connection with their elopement.