The National Authority for Tunnels (NAT) has requested that the Orascom Construction-Taisei Corporation consortium bid on a new tender for the construction works on phase one of Cairo Metro Line 4 before June, Al Mal reports. The authority had called off the tender earlier this year after the Orascom-Taisei consortium, which appeared to be the only qualified bidder, had offered USD 1.3 bn for the project. The planned line will run from 6 October City and end at Al Fustat.