Max Verstappen is set to be investigated by Formula 1 stewards after Singapore Grand Prix qualifying for impeding both Mercedes drivers and Yuki Tsunoda.
In Q1 at Marina Bay, Verstappen stopped at the pit-exit, and held up George Russell and Lewis Hamilton who were both heading out to start their out-laps.
The Red Bull driver then pulled away, but the stewards have decided that the incident deserves further attention.
Later in Q2, Verstappen was slow on the racing line exiting Turn 3, forcing Tsunoda to abandon his first attempt - with the stewards deciding this incident also required further examination.
Elsewhere, Logan Sargeant is being investigated for impeding Lance Stroll, while multiple incidents of drivers going slow in sector 3 on their out-laps have been noted.
All three of Verstappen, Hamilton and Russell made it through to Q2, with Q1 being brought to an early end by a huge accident for Stroll's Aston Martin.
But to make matters worse on a dreadful weekend for Red Bull, both Verstappen and Sergio Perez fell in Q2.