Update: On this other article, a very similar report is provided. However, an important detail is added, given that previously, nobody claimed having seen any "lights":
"A local farmer riding his horse at that time later called the radio channel El Trébol and gave his testimony. He said that from the field, he was able to see a blinding light coming from the sky, and right after he heard the explosion."
A loud explosion was heard and strong tremors were felt today in at least seven towns in the center and West of Santa Fe province, Argentina. "We heard an explosion and windows shook", said witnesses in Cañada de Gómez. The Astronomical Observatory affirmed that it had been "a fireball which disintegrated in the air". There were no reports of wounded victims or damages.