MADISON, Wis. — At least three people were hurt when a porch collapsed during the Mifflin Street Block Party. 

Every year, UW-Madison students gather for an unofficial block party. Streets are packed with students, and there are house parties galore. Second-floor porches are often filled with students. 

First responders were called to a home on the 500 block of Mifflin Street at about 11:45 a.m. Saturday, according to the Madison Police Department. 

Authorities said they’re still investigating the cause of the collapse. Building inspectors and firefighters were seen at the home throughout the afternoon.