A Chinese aviation industry news website says a man has been arrested for allegedly making fake bomb threats against several domestic flights bound for Shanghai.

It's the second time in a week that Chinese flights have been threatened with fake bomb threats. A man is in police custody for allegedly making such calls Wednesday.

China Aviation Resources Net said Saturday that a man surnamed Ji and from the eastern city of Yancheng admitted to making the prank calls Friday afternoon, grounding several flights departing from cities including Beijing, Guangzhou, Chongqing and Shenzhen.

The official Xinhua News Agency says the Chongqing bomb threat delayed all outbound flights and forced inbound flights to return on Friday evening.

Yancheng police confirmed the arrest Saturday but declined to provide further details.