[Watch in the player above: Rescuers clear rubble in search of survivors after Indonesia school collapse (Credit: Basarnas via Storyful)]

SIDOARJO, Indonesia (AP) — Indonesian rescue workers were racing against the clock on Wednesday in the search for survivors from a school collapse in the province of East Java, with at least 91 students still unaccounted for, along with three confirmed dead and about 100 injured.

The Islamic boarding school, which authorities said was undergoing an unauthorized expansion to add two new stories, collapsed during afternoon prayers on Monday, sending slabs of concrete and other heavy debris crashing onto the students below.

Most rescues typically happen within 24 hours after such a disaster, with chances of survival decreasing each day after that, and mo

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