Chinese Coast Guard Attacks at Scarborough Shoal and Second Thomas Shoal: A Timeline of the July 2026 South China Sea Escalation

On July 24, the Philippines reported another water cannon incident at the same shoal. The Philippine Coast Guard stated that at about 6:26 a.m., Chinese Coast Guard vessel 3107 fired its water cannon at the BRP Cape San Agustin (MRRV-4408) from a distance of roughly 400 meters while the Philippine vessel was conducting a maritime patrol and delivering supplies to Filipino fisherfolk .

These July 2026 attacks are part of a sustained pattern of water cannon use by the Chinese Coast Guard in the area:

• September 16, 2025: China fired water cannons at Philippine ships on a humanitarian mission near Scarborough Shoal, with the Philippines reporting one crew member injured .
• June 20, 2025: The Philippines accused Chinese Coast Guard vessels of aiming water cannons at its fishing boats supplying Filipino fishermen at the shoal; one of four fishing vessels sustained damage .
• December 14, 2025: The Philippines reported that Chinese coast guard water cannons injured three fishermen and caused "substantial damage" to two fishing boats near Sabina Shoal .

The Violent Clash at Second Thomas Shoal (July 20, 2026)

Three days before the main Scarborough Shoal water cannon attack, a direct physical confrontation occurred at Second Thomas Shoal (also known as Ayungin Shoal) in the Spratly archipelago on Monday, July 20, 2026.

• The Philippine military said that Chinese Coast Guard personnel aboard a motorboat repeatedly struck a Filipino sailor on the head with a wooden baton, injuring him and damaging his small rubber boat . The assault was captured on video by other Filipino sailors and set off angry condemnations by Philippine officials .
• The clash involved a Chinese coast guard vessel and two Philippine Navy rubber dinghies .
• China lodged a formal protest with the Philippines, accusing Manila of initiating the attack and claiming that Philippine personnel "illegally" launched the dinghies from the grounded BRP Sierra Madre and rammed the Chinese vessel in a "dangerous manner" .
• The U.S. Mission to ASEAN condemned China's actions as "dangerous and aggressive" .
• The Second Thomas Shoal is home to the grounded Philippine warship BRP Sierra Madre, which Manila uses as a forward military outpost . The Philippine intentionally grounded the vessel on the shoal in 1999 to reinforce its territorial claims .

This was not an isolated incident. On June 17, 2024, a Philippine resupply mission to the shoal led to chaos when the China Coast Guard, with support from maritime militia and the People’s Liberation Army Navy, surrounded, rammed, and boarded a Philippine Navy inflatable boat, using knives and axes to damage the vessel and destroy equipment . In that incident, Filipino soldiers fought off the Chinese coast guard "with bare hands" while the Chinese personnel were equipped with swords, spears, and knives . A Philippine sailor lost a thumb due to a collision .

Diplomatic Fallout at the ASEAN Meetings in Manila (July 21–23, 2026)

The two naval clashes unfolded directly alongside the 59th ASEAN Foreign Ministers' Meeting and related summits in Pasay City, Metro Manila, July 21–23, 2026 . The Philippines chaired ASEAN for 2026 .

• U.S. Secretary of State Marco Rubio arrived in Manila for the ASEAN Post-Ministerial Conference .
• Chinese Foreign Minister Wang Yi also attended .
• Russian Foreign Minister Sergey Lavrov attended as well .
• Rubio met with Wang Yi on the sidelines on July 22. According to the SCMP, they discussed President Xi Jinping's planned visit to the U.S. and the South China Sea clashes. Rubio described the dispute over Second Thomas Shoal as "very negative and benefiting no one" . The Reuters report noted that the meeting was held ahead of a possible Trump-Xi summit in September .
• Philippine Foreign Minister Maria Theresa Lazaro also held a bilateral meeting with Wang Yi — their first since 2024 . During that meeting, Wang warned his Philippine counterpart that Manila would "bear the bitter consequences" if it tried to provoke Beijing with the help of other countries .
• On July 23, the same day as the second Scarborough Shoal water cannon incident, Rubio said China's actions in the South China Sea were "destabilizing" .
• The meetings were also dominated by the Middle East crisis and the Strait of Hormuz, but the back-to-back South China Sea clashes became a central point of contention .

Broader Context of the Territorial Disputes

Scarborough Shoal — Located about 220 km west of the Philippines' Zambales province, this atoll is claimed by both countries. China took de facto control of the shoal in 2012 following a maritime standoff with the Philippines . Since then, China has been aggressively reinforcing its control:

• In April 2026, satellite imagery showed China deploying ships and a floating barrier to block the shoal's entrance .
• In June 2026, the Philippines urged China to remove a newly installed 6x6-meter floating structure on Scarborough Shoal, saying it breached the ASEAN-China Declaration on the Conduct of Parties in the South China Sea .
• In March 2026, the Philippines rejected China's claim that a Filipino diplomat had acknowledged Scarborough Shoal did not belong to the Philippines .
• In September 2025, China announced the establishment of the Huangyan Island National Nature Reserve on the shoal, prompting Philippine protests .

Second Thomas Shoal (Ayungin Shoal) — Located in the Spratly archipelago about 194 km west of Palawan, Philippines, this submerged reef holds the grounded BRP Sierra Madre . China has deployed armed coast guard and militia vessels there to block Philippine resupply missions . The July 2026 baton attack was among the most violent direct physical confrontations to date, involving personnel-to-personnel contact rather than just ship-to-ship harassment .

Both shoals remain the most volatile flashpoints in the broader 2016 Permanent Court of Arbitration ruling, which declared China's expansive claims to the South China Sea illegal under international law . Beijing rejects that ruling entirely. The U.S. remains committed to its Mutual Defense Treaty with the Philippines, though Washington has not directly intervened in these incidents. On July 20, 2026, the U.S. Mission to ASEAN condemned China's actions , and on July 22, Rubio reaffirmed U.S. support for freedom of navigation and the 2016 arbitration ruling .