Searchers have pulled 10 bodies from a well in northern Mexico, near the site where 20 members of a Colombian-style music group and its crew disappeared late last week, according to a state forensic official.
It is not clear how many more bodies might be in the water, said the official.
Nuevo Leon state governor Rodrigo Medina earlier told a local television station: "We have evidence that indicates that (the bodies) may very well be the members of this band."
Experts are still working to identify the bodies.
Sixteen members of the band Kombo Kolombia and four crew members were reported missing early on Friday after playing a private show at a bar in the town of Hidalgo, north of Monterrey.
People living near the bar in Hidalgo reported hearing gunshots on Friday morning, followed by the sound of vehicles speeding away, said a separate source with the Nuevo Leon State Investigative Agency.
The officials added that gunfire is common in the area and said investigators found spent bullets nearby.
Relatives filed a missing persons report on Friday after losing mobile phone contact with the musicians. When they went to the bar to investigate, they found the band members' vehicles still parked outside.
Kombo Kolombia played a Colombian style of music known as vallenato, which is popular in Nuevo Leon state. Most of the group's musicians were from the area, though state officials said one of those missing is a Colombian citizen with Mexican residency.