(CNN) -- Argentinian authorities rescued 12 people who had become trapped in rubble after a gym in Buenos Aires collapsed Monday. Rescuers continued to search in the debris, but they said they didn't expect to find anyone else.
Digging at a construction site next door to the gym was believed to be related to the collapse, the state-run Telam news agency reported.
"The excavating machines were removing earth, and a moment later you could hear a tremor," a witness told Telam.
Besides the 12 people who were rescued, eight others were injured and transported to area hospitals. No fatalities were reported.
CNN en Espanol's Guillermo Fontana contributed to this report.