Lewis Hamilton and George Russell have been summoned to the FIA stewards over an incident in Belgian Grand Prix qualifying.
The duo were following each other as the Spa-Francorchamps circuit dried at the start of Q2, with Hamilton running off-track at Eau Rouge and Raidillon, rejoining on track ahead of Russell.
That incident is under investigation for the seven-time champion allegedly rejoining the circuit in an unsafe manner.
If found guilty, Hamilton's fourth-place finish in qualifying would likely be taken away by a grid penalty.
The position will become third by virtue of Max Verstappen's gearbox change, with the Dutchman dropping from pole to sixth.
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Albon, Magnussen also summoned
Alex Albon will face an investigation for the same infringement having run wide at Rivage in Q1.
The off-track excursion cost the Williams driver any chance of reaching the second part of qualifying, eventually finishing just 16th.
Kevin Magnussen will almost certainly take a hit for blocking Charles Leclerc - the Haas driver slowing the Monégasque's progress in Q2.