Sebastian Vettel will start his first race for Aston Martin at the back of the grid after being hit with a penalty at the Bahrain Grand Prix.

Vettel has been penalised for ignoring yellow flags in qualifying at the Bahrain International Circuit in Sakhir on Saturday.

The four-time Formula One world champion breached the rules when Haas driver Nikita Mazepin spun at Turn 1 during Q1, resulting in double waving of yellow flags - which Vettel failed to respect.

Vettel qualified in 18th but was given a five-place penalty and hit with three penalty points after being summoned to the stewards ahead of Sunday's race.

The stewards said in their verdict: "[Valtteri] Bottas, Vettel, [Sergio] Perez and [George] Russell approached the scene and drove past Mazepin. Bottas, was immediately instructed by his team to abort his lap in accordance with the Race Director's Event Notes.

"Perez and Russell had received the chequered flag, and were instructed to slow, with Russell receiving the additional information that it had been a double yellow sector.

"Vettel did not abandon his lap. He explained to the stewards that he saw the smoke ahead of him, but was unsure if it was a lock-up or a stopped car until he was quite close to the car and the smoke was lifting.

"The stewards observed that he had already passed the signal panel when it illuminated as he approached the scene, and that the marshals in that turn had not yet reacted with a yellow flag. Nevertheless, Vettel was approaching a car that was stopped sideways on the track and by the rule this would necessitate a double yellow flag."

Vettel said: "We were already quite far back so it doesn't make a difference.

"Hopefully we will come up with something clever with strategy so we can move up and enjoy it along the way."