Security footage has revealed that at around 3am on Sunday morning, three intruders – believed to be teenagers – broke into Sydney Secondary College’s Balmain and Leichhardt campuses.The state school is split into three campuses across the inner west of Sydney, including in Balmain, Leichhardt and Blackwattle Bay.Over the course of two hours, the group proceeded to smash through almost the entire Balmain campus, including the administration block, all staffrooms, some classrooms, the library and the canteen. More than 30 computer monitors were destroyed along with teachers’ personal items such as photos.Doors and windows were broken, along with other forms of damage – but in a sickening move, the intruders also aggressively targeted the school’s extensive marine animal collection.Tragically, “hundreds” of fish, snails, yabbies and aquatic plants were killed, and the school’s two axolotls, affectionately known as Olive and Mango, were stolen before being callously dumped in a laneway, i