Race control have halted the session due to debris on track. Stroll has significant damage to his car, while Leclerc's front wing damage was completely broken.
He's ran into the back of Stroll at the hairpin. Leclerc was on a hot lap at the time but Stroll didn't see him coming.
Hulkenberg goes fastest now for Sauber, 0.3s ahead of Hamilton. The times will continue to tumble as the drivers get up to speed and more confident.
Hamilton sets a 1m16.865s to take to the top of the order. He's running on the mediums at the moment. The McLarens are on the softs.
Leclerc locks up and runs wide at Turn 5. No harm done as he manages to reverse his car and get going again.
Lawson, Hadjar, Hulkenberg, Bearman, Ocon and Norris take to the track.

Crash.net journalist Lewis Larkam spoke to Carlos Sainz ahead of this weekend's Monaco Grand Prix.
The Spaniard defended Lewis Hamilton for his tough start to life at Ferrari in 2025.
CLICK HERE: To read the article in full.

Hello everyone and welcome to the Crash.net live blog for Friday at the Monaco Grand Prix.
FP1 gets underway in just under 20 minutes.