Xiamen Air confirmed on its official Sina Weibo account on Monday that its three crew members were questioned by police in Singapore for fighting each other while having a meal.

The airline said that the crew members checked in a hotel after flying from Fuzhou to Singapore on flight MF855, and went out for a dinner on Saturday evening.

During the meal, they broke into a quarrel, and then were taken away by local police.

According to Legal Evening News, the three were the flight's copilot, purser and safety officer. The quarrel during the late-night meal quickly escalated into fistfight and breaking someone's head with bottles.

Xiamen Air said on Weibo that it would further enhance the overseas aircrew management, and would deal seriously with all violations of rules. The incident is under investigation.