Hostilities in the area started on the evening of August 29, when hundreds of rebels attacked the Civil Guard garrison in Pasig, just as hundreds of other rebels personally led by Bonifacio were amassing in San Juan del Monte, which they attacked at about 4 a.m. on the 30th. Bonifacio planned to capture the San Juan del Monte powder magazine along with a water station which supplied Manila. The Spaniards, outnumbered, fought a delaying battle until reinforcements arrived. Once reinforced, the Spaniards drove Bonifacio's forces back with heavy casualties. Elsewhere, rebels attacked Mandaluyong, Sampaloc, Sta. Ana, Pandacan, Pateros, Marikina, and Caloocan, as well as Makati and Taguig. Balintawak in Caloocan saw intense fighting. Rebel troops tended to gravitate towards fighting in San Juan del Monte and Sampaloc. South of Manila, a thousand-strong rebel force attacked a small force of civil guards. In Pandacan, Katipuneros attacked the parish church, making the parish priest run for his life.