The U.S. forces in Japan have notified the Japanese government of its plan to resume aerial refueling training for U.S. Marine Corps Osprey aircraft possibly early next month, following the ditching of an Osprey off Okinawa earlier this month, a government source said Thursday.

The government is in talks with the United States on how to restart the exercise, which is expected to spark anger from local residents due to the ditching during one such drill involving U.S. Marine Corps MV-22 tilt-rotor aircraft on the evening of Dec. 13, the sources said.

The aircraft broke apart upon impact with the sea and two of the five crew members were injured. The U.S. military blamed the incident on an oil duct problem during mid-air refueling.