Gurugram, Jan 5 (IANS): The contractor of Pink City Expressway Pvt Ltd and some officials of the National Highways Authority of India (NHAI) have been booked over the crash of a portion of the Rampura flyover on the Delhi-Jaipur highway, a police officer said.

The contractor of Pink City Expressway Pvt Ltd and officials of the NHAI were on December 19 booked in connection with the accident.

A six square feet portion of the flyover - nearly 46 km from Delhi - fell off on December 17 and an FIR was lodged on December 19 under the Indian Penal Code (IPC).

Those booked include officials of Pink City Expressway Pvt Ltd (PCEPL), the company constructing the 225-km Expressway.

The case was registered on the complaint of a group of Right to Information (RTI) activists including Ramesh Yadav, Baldev Mehra, Omprakash Kataria and others.

Meanwhile, officials of the NHAI and police on Saturday again failed to collect the building material samples of the fallen portion of the Rampura flyover. They had failed to collect them on December 24 as well.

The NHAI officials took the samples on Saturday in the presence of one of the complainants, Ramesh Yadav, but it was inadequate.

"Samples could not be collected properly as the steel rods used in building the flyover became a hurdle in complete sample collection," Charan Singh, the Investigation Officer, told IANS.

Singh said that samples will be collected again and sent to the Forensic Science Laboratory in Haryana's Madhuban for quality testing.

Earlier, in 2012, the concessionaire of the Gurugram-Jaipur highway was booked when a sizeable portion of the road near the same Rampura-Naurangpur stretch got washed away. Later, he was let off after paying a fine of only Rs 450.