McLaren's championship leader Lando Norris went fastest in Thursday's second practice for the Las Vegas Grand Prix, which featured two late red flags.

The Briton, who boasts a 24-point lead over teammate Oscar Piastri in the drivers standings entering Sunday's race, completed his hot lap just before crimson fury struck the Las Vegas Strip.

Norris was quickest around the 6.201-km street circuit with a lap of 1min 33.602secs -- 0.029sec ahead of Mercedes' Kimi Antonelli.

Moments later, the session was red-flagged for a possible loose manhole cover.

Cars returned to the track with six minutes remaining, time enough for Charles Leclerc of Ferrari to end his session behind a safety barrier due to a gearbox issue, before a final red flag concluded the session early.

Monaco's Leclerc was thi

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