Highights - Turkish Grand Prix
Lewis Hamilton led a McLaren one-two after an extraordinary clash between Red Bull's Mark Webber and Sebastian Vettel at the Turkish Grand Prix.
The incident happened on lap 40 of 58 when Vettel flew off the track after colliding with Webber in an attempt to take the lead from his team-mate.
Hamilton's team-mate Jenson Button briefly passed him on lap 48 only for Hamilton to repass at the next corner.
Webber finished third while Mercedes's Michael Schumacher was fourth.
The German's team-mate Nico Rosberg finished fifth to cap off a good weekend for Ross Brawn's team.
Their joy was in stark contrast to that of the Ferrari team, with three-time Istanbul winner Felipe Massa finishing seventh while Fernando Alonso, who qualified in 12th, a further place behind.
But they were the sideshow in a race that will be remembered for the remarkable incident between the Red Bulls.
There was no repeat of the domination Red Bull displayed in the last two races, as the McLaren drivers pressured them hard throughout the race.
Webber had led from pole but Hamilton and Vettel were right with him until the pit stops.
Vettel had briefly taken second from the Englishman on the first lap, only for Hamilton to pass him back around the outside of Turn Three.
But the German took the position back again at the pit stops and set about putting pressure on Webber, with the McLarens right behind them.
Vettel unhappy after race-ending collision
The McLarens appeared to be faster than the Red Bulls, and Vettel decided to take a chance on the inside of Webber with 18 laps to go and appeared to veer right too early causing him to lose his rear right after it came in contact with the other car.
The Red Bull team, led by team principal Christian Horner, looked at their screens in horror as Vettel careered off the track while Webber, who also flew off, was forced to come into the pits to have his damaged nose-cone replaced.
"I dived down the inside and I had the corner," said Vettel.
"I was just trying to get the braking point and suddenly I lost the car. You can see we touched.
"I'm not the kind of guy who pushes the fault to one guy. We are a team and we have to respect that."
Webber believed that the German had turned right too soon.
Turkish GP - Top three drivers
"Seb had a big top speed advantage," said championship leader Webber, who is now on 93 points, five ahead of second-placed Button.
"He went down the inside. It looked like he turned pretty quick right and we made contact. Not an ideal day. The McLarens were solid today. Neither of us wanted to make contact with each other but it can happen sometimes."
Horner was left unimpressed with the incident.
"They should never have been where they were," said the Red Bull chief.
"What we always ask is for drivers to give each other room. And today we handed 43 points to McLaren. We need to sit down, go through it and come back stronger at the next event."
With Vettel out and Webber in third, Hamilton was now favourite to win his first race of the season, with team-mate Button, who watched Hamilton and the Red Bulls from a distance during much of the race, up to second.
The McLaren drivers were told to save fuel but soon Button was challenging Hamilton and he took the lead briefly by going around the outside of Turn 12, which becomes the inside of Turn 13, the corner on to the pit straight.
But Hamilton was not about to give up the lead without a fight and he dived down the inside at Turn One. The two cars brushed wheels and Hamilton reclaimed the lead, which he held on to up to and beyond the chequered flag.
"We knew we had great race pace but we had to stay with Red Bulls," said Hamilton, who before Istanbul had not won since Singapore last year.
"They were so much faster through Turn Eight and it was hard to stay in Webber's slipstream.
"I'm not sure what happened with the Red Bull guys but I had a fair battle with Button and it was a great result for the team. I want to dedicate this win for my dad who is 50 tomorrow."
Victory took Hamilton to third in the championship on 84 points, ahead of Alonso in fourth on 79. Vettel is down to fifth overall, a point behind the Spaniard.
Vettel and Webber's catastrophic collision