Ricciardo fastest in second practice, Hamilton 2nd, Rosberg 3rd, Verstappen 4th
Vettel & Grosjean hit barrier, Haryanto & Magnussen crash out
Hamilton fastest in first practice, after series of crashes
There's quite the hole in Nico Rosberg's left rear. It looks like he goes over some debris, perhaps the cause of the puncture. Right behind him is Jenson Button and he also drives over the debris.
The virtual safety car is deployed again. There's debris at Sainte Devote and the camera cuts to Nico Rosberg limping around the track. He's had a rear left puncture.
He's not the only one as Jenson Button is informed of a puncture to his right rear.
Here's a picture of Jolyon Palmer after he hit the wall earlier. Not ideal given the rumours swirling about his future in F1.
And there's another off at Sainte Devote as Daniil Kvyat is down the escape road. He recovers and gets back on his way. Minimum fuss.
Yowzer! Twitchy bum time for Valtteri Bottas as he has a right old wobble coming through the tunnel, the back snaps away but credit to the Finn as he holds it together and keeps the Williams away from the walls.
Jack Nicholls
Radio 5 live Formula 1 commentator
Plenty of you have been asking why the drivers can change their helmet designs when it is against the rules. Well because Monaco is so special they have basically said "we'll let you off this weekend but don't be naughty again".
Felipe Nasr locks up on the run down to Sainte Devote and is into the run off area. A cheeky U-turn and he is back on his way with minimum fuss.
Meanwhile, Daniil Kvyat improves with a 1:16.426, putting him within eight tenths of a second of Lewis Hamilton. The young Russian is certainly determined to claw back his reputation after his demotion from Red Bull.
The marshals are on their game today as the stricken Renault is swiftly dealt with and the track is green again.
Eighteen minutes to go.
BBC Radio 5 live sports extra
By the way, if you were listening to commentary and went away momentarily and have returned to hear French Open tennis action, commentary from Monaco is now online only. You can listen to it through this page.
It looks like Jolyon Palmer lost the rear of his Renault and couldn't prevent his car kissing the barrier round the outside of the corner.
The virtual safety car is deployed for the second time as the camera cuts to Jolyon Palmer climbing out of his Renault, which appears to have hit the wall at Tabac.
"Sorry guys," he says over team radio.
An improvement from Sebastian Vettel on the ultra softs, clocking 1:15.956. He stays third quickest.
Bianchi family to sue over 'avoidable' death
The family of ex-Formula 1 racing driver Jules Bianchi are taking legal action following the 25-year-old Frenchman's death last year.
Bianchi suffered fatal head injuries when his car collided with a mobile crane at the Japanese Grand Prix at Suzuka in October 2014.
Lawyers for the Bianchi family are planning litigation against F1's governing body, Team Marussia, for whom Bianchi was driving, and the Formula 1 Group of companies who control television and media rights.
Esteban Gutierrez has come to a halt on the run down to Portier and the virtual safety car is deployed.
"Something went wrong," he says over team radio.
He's not wrong there.
Sebastian Vettel has just jumped up to P3 after a 1:16.342, set on the ultrasofts.
1) Hamilton 2) Rosberg 3) Vettel 4) Verstappen 5) Ricciardo 6) Hulkenberg 7) Perez 8) Kvyat 9) Sainz 10) Grosjean
Sebastian Vettel is currently sixth fastest, with the two Red Bulls and the Toro Rosso of Daniil Kvyat behind the Mercedes on the timesheet.
Max Verstappen has looked particularly impressive and his 1:16.371 has him P3, seventh tenths off Nico Rosberg.