PALOS VERDES, Calif (Reuters) – Film director and deep-sea explorer James Cameron said on Wednesday that BP Plc turned down his offer to help combat the massive oil spill in the Gulf of Mexico.

"Over the last few weeks I've watched, as we all have, with growing horror and heartache, watching what's happening in the Gulf and thinking those morons don't know what they're doing," Cameron said at the All Things Digital technology conference.

Cameron, the director of "Avatar" and "Titanic," has worked extensively with robot submarines and is considered an expert in undersea filming. He did not say explicitly who he meant when he referred to "those morons."

His comments came a day after he participated in a meeting at the U.S. Environmental Protection Agency headquarters in Washington to "brainstorm" solutions to the oil spill.

Cameron said he has offered to help the government and BP in dealing with the spill. He said he was "graciously" turned away by the British energy giant.