Daniel Ricciardo says an electrical problem in his Red Bull RB11 ended his British Grand Prix as his difficult string of races continued at Silverstone.
Ricciardo was running inside the top 10 when he suffered a loss of power, before ultimately retiring from the race.
Ricciardo's retirement means he has scored just a single point across the last three races.
"I was really optimistic and excited for this weekend but it didn’t work out for us on the day," said Ricciardo.
"We suffered an electrical problem which forced us to retire. I could feel the loss of power going into Turn 7, we tried circulating for a few laps to try and fix it, we also tried to reboot the engine in the pits but unfortunately it didn’t work.
"The last few races haven’t been kind to us but that’s racing. We have some time off to look forward to and we’ll go into Hungary a little more hopeful as the track there should suit us better."
Toro Rosso driver Carlos Sainz Jr. was also forced to retire, with the squad suspecting that he too was slowed by an electrical issue.
"Not the best of endings to a race that was looking good… It was a tough start to the race and during the first stint I struggled a bit, but as soon as I pitted for another set of tyres we picked up the pace and started to push," he said.
"From then on, it was all going really well, running comfortably in P9 and waiting for the rain to arrive, but suddenly my car just switched off and that was the end."