The Philippine military said on Saturday it strongly condemns "dangerous and provocative actions" by China's air force at a contested shoal in the South China Sea.
Two People's Liberation Army Air Force aircraft executed a dangerous manoeuvre and dropped flares in the path of a Philippine Air Force aircraft conducting a routine maritime patrol over the Scarborough shoal on Thursday morning, the military said in a statement.
It "endangered the lives of our personnel undertaking maritime security operations recently within Philippine maritime zones", said Philippines armed forces chief Romeo Brawner, adding that the Chinese aircraft interfered with lawful flight operations and violated international law on aviation safety.
China's embassy in Manila did not immediately respond to a request for comment.
Beijing claims almost all of the South China Sea, a conduit for more than $3 trillion (AED 11 trillion) of annual shipborne commerce, including parts claimed by the Philippines, Vietnam, Indonesia, Malaysia and Brunei.
China rejected a 2016 ruling by the Permanent Court of Arbitration in the Hague that Beijing's expansive claims had no basis under international law.

Brazilian flotilla activist returns home, alleges torture during Israel detention
Malaysia searches for 14 missing after migrant boat capsizes
Trump says Iran ceasefire 'on life support' after he rejects Tehran's response
Hospitals evacuated, MSF services halted as rival gangs clash in Haiti's capital
India's Modi to begin five-nation tour, including UAE
EU ministers agree on sanctions targeting violent West Bank settlers
Last six passengers leave Hantavirus-hit ship as captain hails their patience
Suspect in Trump attempted assassination pleads not guilty
