BEIJING (AP) — China said Wednesday that U.S. investigators haven’t released any information about the cause of a China Eastern Airlines jetliner crash in March after The Wall Street Journal reported its flight data recorder indicated someone pushed the Boeing 737-800 into a steep dive.

American investigators confirmed to the Civil Aviation Administration of China that they released no information to reporters, the government newspaper Global Times reported. Phone calls to CAAC weren’t answered.

A foreign ministry spokesman, Wang Wenbin, referred reporters to the Global Times report in response to requests for information about the investigation.

All 123 passengers and nine crew members were killed on March 21 when the plane dived from about 8,800 meters (29,000 feet) while flying from Kunming in China’s southwest to Guangzhou near Hong Kong. Debris was scattered across a mountainous area.

The Journal, citing people familiar with U.S. officials’ preliminary assessment, said the data recorder suggests inputs to the controls pushed the plane into the fatal dive. It said American investigators were looking at the actions of a pilot and there also was a possibility someone else could have broken into the cockpit and caused the crash.

A seven-member team from the National Transportation Safety Board arrived in China on April 2 to help with the investigation of the U.S.-manufactured aircraft. Its flight data recorder was being analyzed at a laboratory in Washington.

The 737-800 has one of the aviation industry’s best safety records. China’s airline industry, one of the world’s biggest, has had relatively few mishaps in recent years.