On October 22, Israel admitted to using white phosphorus in Lebanon.[164] Although Israel continues to deny the use of phosphorus on civilians, doctors in southern Lebanon have suspected some injuries were caused by contact with the chemical.[165] On October 23, Lebanese police reported the "most intensive [Israeli] overflights" of Lebanon after the ceasefire. Two jets flew low over Beirut, while four more aircraft conducted sonic boom raid in Tyre.[166][167] France, who leads UNIFIL troops, called the continuing overflights "extremely dangerous."[168] On October 24, six Israeli F-16's flew over a German vessel patrolling off Israel's coast just south of the Lebanese border. The German Defence Ministry said that the planes had given off infrared decoys and one of the aircraft had fired two shots into the air, which had not been specifically aimed.