Nico Hulkenberg and Sergio Perez have apologised after two separate accidents ended Force India's streak of top 10 finishes in 2014.
Hulkenberg tagged Perez at the final corner and the resulting damage sent the German into the tyre barrier.
Perez continued for a few more laps but dipped a wheel onto the wet kerb exiting the last turn and slammed into the pit wall.
"It was not the best day in the office and I’m feeling very disappointed," said Hulkenberg.
"The track was drying out and I was quite close behind Checo [Perez] when I made contact with him at the final corner. The previous lap he had taken a much wider line so I tried to overtake on the inside, but he took a tighter line and I couldn’t back out of the move.
"I made contact with his car, lost my front wing and went straight on into the barrier. It was my mistake and I’ve apologised to the team. It’s especially frustrating because there was a lot of potential in this race, but I guess it was one of those days when things didn’t go our way."
Perez admitted that he was simply caught out by the conditions.
"It's a very disappointing end to our weekend, just when it looked like we could have scored some big points," he said.
"I went a little wide on the exit kerb of the final corner, lost the rear and that was it – I was in the wall. It was a very unfortunate end to our race and I feel sorry for the team because they deserved some points today.
"Conditions were very difficult, the track was drying and improving, and it made you want to push to the limit, but there were some wet patches that could catch you out. We'll take the positive elements of this weekend and get back in the points in the next race."