Hamilton wins as Perez suffers late engine failure to lose third
Long delay after Grosjean escapes first-lap crash which causes huge fire
Haas driver reported by team as 'OK' after escaping on-fire monocoque embedded within barrier
Car's cockpit breaks away from chassis before breaching barrier
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Lap 38/57
Daniel Ricciardo and Esteban Ocon are having an inter-team battle for 10th. Ocon has the position, Ricciardo has a little nibble but Ocon defends. However, Ricciardo gets the better of his team-mate soon after with DRS helping him to complete the move into Turn 4.
Jolyon Palmer
Former Renault driver on BBC Radio 5 live
Verstappen did have a slow stop but then put in the fastest second and third sectors of the grand prix, which is why the damage was only just over a second to Lewis Hamilton.
In terms of strategy, though, that is checkmate to Hamilton. There is little hope of Verstappen getting back in this now in a pure fight, but you never know what else can happen.
Lap 37/57
Sergio Perez makes his second official stop and that elevates Max Verstappen into second, 3.5 seconds behind Lewis Hamilton.
Lando Norris is third but he is yet to come in for his next stop.
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The FIA have released a short statement following Romain Grosjean's crash at the start of today's race:
"The driver was immediately attended to by emergency and medical crews. The driver self-extricated, and was conscious at all times. He was taken to the medical centre before being transferred to Bahrain Defence Force (BDF) Hospital by helicopter where he is undergoing further evaluation."
Jolyon Palmer
Former Renault driver on BBC Radio 5 live
The hard tyre looks to be the only tyre to get them to the end now in a comfortable fashion.
Lap 35/57
Mercedes respond to the Red Bull stop as Lewis Hamilton pits from the lead. On go the hard tyres and he is back out in first, 1.8 seconds ahead of Sergio Perez and four seconds ahead of Max Verstappen in third.
Jack Nicholls
BBC Radio 5 Live F1 commentator
Slow pit-stop for Verstappen for seemingly no reason. He lost big time there.
Lap 34/57
Red Bull look to be trying the undercut as Max Verstappen pits from second but its a poor, poor stop - five seconds - and that's really going to scupper those hopes. Verstappen, on hards, is out in third.
Lap 33/57
Kimi Raikkonen has damage on his Alfa Romeo, providing a bit of an explanation for his difficult race so far.
Lap 32/57
Sebastian Vettel gets the better of his old Ferrari team-mate Kimi Raikkonen, taking advantage of a lock up by the Finn to move into 15th. Not the place on the grid that either would be particularly happy battling in.
Lap 31/57
Valtteri Bottas is hovering on the edge of the points. He is right behind Charles Leclerc, with the Ferrrari a bit all over the place. Bottas bides his time before sweeping past Leclerc and into 10th.
Red Bull: "Lewis is using a lot more on the track on the exit to Turn Four."
Hamilton leads from Verstappen and Perez
Chris Doherty: Love seeing Sainz drove through the field, but as a McLaren fan I'm gutted the car let him down in qualy, who knows where he could be if he got into Q3.
Lap 29/57
Lewis Hamilton is 5.3 seconds ahead of Max Verstappen out in front, with Sergio Perez 16 seconds behind the Red Bull in third. Very much looking a two-horse race.
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Jolyon Palmer
Former Renault driver on BBC Radio 5 live
Super impressive from Sainz - so committed on the brakes.
Probably a good 10-20 metres later on the brakes than Ocon and just sailed around the outside.
Brilliant move from Sainz, up to sixth. McLaren are looking quite good here.
Lap 28/57
Carlos Sainz has gained the most places so far in this race, climbing nine places and is currently sixth while Valtteri Bottas has lost the most with six. The Finn is down in 11th.
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Lap 26/57
Lando Norris zips past Valtteri Bottas with the assistance of DRS and the McLaren driver is up to fifth.
Jolyon Palmer
Former Renault driver on BBC Radio 5 live
It is pretty much a two-horse race, which is no surprise, so Verstappen is just giving it a go now.
He's four seconds back. Probably, he will burn through his tyres very quickly and need a new set to try to get to the end of the race.
He doesn't want to have to do a three-stop by completely destroying this hard tyre so he can't be too kamikaze now, but he's giving it a good go.
He's got very little pressure from behind, so it makes sense.