“We have not yet been able to identify the exact location where the two suspects got down from the train which can help us track vital details about their escape. However, the portraits have been circulated in the area and a reward of Rs 1 lakh has already been announced on any information,” said Railway protection Force SP Bharti Arora.

Rana Shaukat Ali, an important witness and survivor of the blasts, provided details about the appearance of the two suspects and helped police in preparing the portraits. He had reportedly told investigators that they argued with RPF constable Kashmir Singh when he asked them for their travel documents. The suspects had claimed that they wanted to go to Ahmedabad. The RPF constable then told them that they had boarded the wrong train. The suspects then got down at a place about 15-20 minutes before the Diwana railway station where the blasts took place.

Haryana Police, which is investigating the case, is reported to have received a number of calls from people. A senior Haryana police, who is part of the investigating team, said: “Based on the response we have received from people on the identity of the suspects, we have dispatched teams to Uttar Pradesh, Rajasthan and Delhi.”

Investigators in Delhi are exploring the possibility that the militants might have used carriers for planting the suitcases in the train. A senior Delhi Police officer said they have a list of about 68 carriers who have been active in carrying out illegal trade across the border. “It is possible that the militants might have used carriers for planting explosives,” a senior Delhi Police officer said.

Meanwhile, train driver Karan Dewan, assistant driver Sanjay Kumar along with the guard and TTE today appeared before a Haryana Police team and recorded their statements. The Commissioner for Railway Safety will start his inquiry on Friday. All officials, who recorded their statements, have been told to appear before it on Friday and Saturday.