Verstappen and Perez are still pushing out there so expect some changes to the order.
He goes fastest in the first sector...
He slots into second in the Red Bull, within a tenth of Hamilton's top lap.
Sainz confirms Ferrari's solid pace as he moves into third, 0.3s off Hamilton.
Hamilton, Norris, Piastri, Perez, Leclerc, Verstappen, Ricciardo, Bearman, Hulkenberg and Sainz is the top 10.
Hamilton, Norris, Piastri, Perez, Leclerc, Verstappen, Ricciardo, Bearman, Hulkenberg and Sainz.
Hamilton had gone fastest but Colapinto has crashed. Red flag.
A 1m46.282s for the McLaren driver puts him 0.3s ahead of Perez in third.
Norris now takes to the top in the other McLaren, just over 0.2s ahead of his teammate.
The majority of the grid heads back out on track on the softs.
Leclerc, Verstappen, Norris, Russell, Hamilton, Tsunoda, Ricciardo, Sainz, Piastri and Hulkenberg.
Leclerc has crashed at Turn 15. Red flag.
It's third for the McLaren driver, 0.6s off the pace.
Leclerc sets a 1m46.608s to go 0.2s ahead of Verstappen. Hamilton is 1.0s off in third.
The order with 40 minutes on the clock: Verstappen, Leclerc, Hamilton, Piastri, Hulkenberg, Russell, Sainz, Norris, Tsunoda and Alonso.
It seems that the cause of the red flag was some debris on the track.
Stroll not happy with the handling of his Aston Martin: "This is not a car. This is not a car right now."
The session has been halted. Not sure why just yet though.
A 1m47.214s for the reigning world champion puts him top of FP1 with 47 minutes on the clock.
A 1m47.501s for Leclerc puts him back on top of the order, a tenth ahead of Hamilton.
Hamilton sets a 1m47.618s now to lower the overall benchmark in FP1. Still over seven seconds off Leclerc's pole time from last year.
A 1m49.740s for the Ferrari driver, 0.3s ahead of 'king of the streets' Perez.
Ricciardo sets a 1m51.798s for VCARB, 1.7s ahead of Stroll in second. Expect times to come down by around by 10 seconds come qualifying.
Albon, Stroll and Piastri take to the track early on in Baku.