Architecture for Humanity's Cameron Sinclair shares some tragic news today: A suicide bombing outside NATO International Security Assistance Force headquarter in Kabul, Afghanistan, claimed the lives of several children involved with an Architecture for Humanity project.

Four of the six children confirmed killed by the Sept. 8 attack were volunteers at Skateistan, Kabul's first inoor skateboarding park. The organization posted an entry on its website describing the lives cut short and the impact that they had, as volunteers and teachers, on their community. Khorshid, who was 14, was a staff teacher and a role model to dozens of young girls at Skateistan. Nawab, 17, and Mohammad Eeza, 13, were described as among Skateistan's first students. The youngest Skateistan student killed in the attack was Parwana, 8, who was Khorshid's sister.

Designed by Convic Design with support from Architecture for Humanity, Skateistan is Afghanistan's only coeducational skatepark—a sports facility that also serves as a school offering computer training, English tutoring, and other skills. The building has been open since October 2009.

According to The Guardian, the Taliban claimed credit for the suicide bombing, which was carried out by a teenager.

Sinclair passes on this video on Skateistan and its students.