An ultra-light aircraft crashed Thursday on the side of a highway in Teheran on Thursday, killing the pilot and a passenger, state television reported. The broadcast said the plane was an ultra light training craft, the sort usually used on recreational flights. The plane crashed in the morning on a highway in a northeastern section of the capital. State TV said the two on board the craft were killed, but there were no casualties on the ground - apparently because traffic ahead of a major Muslim holiday this weekend was light. The broadcast provided no further details on the cause or the type of aircraft.