Construction work on a major new motorsport complex near Austin, Texas, has been halted until a contract for hosting the US Formula One Grand Prix in 2012 is completed.

The Circuit of The Americas confirmed that all work at the venue has been suspended as the race contract between Formula One and the venue had not yet been received.

In addition to a 3.4-mile (5.5km) Hermann Tilke-designed circuit, the facility will also boast a medical facility; a conference centre; an outdoor live music space; and a banquet hall.

Bobby Epstein, founding partner of Circuit of the Americas, said: "We have spent tremendous resources preparing for the Formula One and MotoGP Championship races, but the failure to deliver race contracts gives us great concern.

"Given the purpose-built Tilke design, creating a unique fan experience and iconic challenge for drivers, we hope that Texas will not be left behind."

Image: Circuit of The Americas