An investigation into the late crash between Formula E championship leader Jean-Eric Vergne and Felipe Massa in Saturday's New York opener determined neither was to blame for causing the collision.
The investigation followed the pair's collision at the Turn 2 right-hander on the final lap of the race as they fought over ninth place.
Vergne dived to the inside of Massa's Venturi-run car at the preceding Turn 1 switchback and the pair made contact away from the apex of the corner, with Vergne forced deep but still alongside Massa.
They then came together again, with Vergne hitting the Turn 2 inside wall, heavily damaging the front of his car and spinning Massa.
Massa was subsequently hit by Jerome D'Ambrosio and Andre Lotterer, while Vergne was run into by Stoffel Vandoorne - although all those drivers were able to escape the entanglement and finish the race.
An FIA bulletin explaining the outcome read: "The stewards have examined the video evidence and heard evidence from the drivers of car #19 [Massa] and car #25 [Vergne], determined neither driver was primarily at fault for the incident.
"Telemetry data from both cars on the lap in question and previous laps showed that neither car took Turn 1 in an unusual manner.
"There was incidental contact in the middle of Turn 1 under braking. Car #25 was offline on dirty pavement at the exit of Turn 1 and was attempting to regain the course at the entrance of Turn 2 when contact occurred.
"While car #19 could have allowed more room at Turn 2 neither driver was primarily at fault for the collision. The stewards take no further action."
The two drivers disagreed on who was to blame for the incident, with Vergne telling Autosport: "I tried to pass him so he crossed me.
"I don't know what went through his mind but he completely squeezed me into the wall, kept his line, didn't give me any room."
In a Venturi statement, Massa said: "He tried a kamikaze move on the brakes at the end of the main straight.
"When I saw him coming, I knew he would not be able to stop. In the end, it created a huge accident. He destroyed my race and destroyed his championship today."
Vergne was classified 15th, one position ahead of Massa, and had his standings lead cut to 22 points ahead of Sunday's season finale.
In a third post-race investigation, after Techeetah unsuccessfully protested Vergne's main title rival Lucas di Grassi, no further action was taken against Edoardo Mortara and Oliver Rowland regarding their clash at the exit of Turn 10 on lap 28 that ultimately eliminated Mortara and caused major damage to the front of Rowland's Nissan e.dams car.