(CNN) — An underwater search team specializing in unsolved missing persons cases found about 30 submerged cars in a South Florida lake over the weekend, police said.

Dive teams from various agencies recovered the vehicles from a lake in Doral and a “thorough investigation will be conducted,” the Doral Police Department said.

“At this time, it is unknown if these vehicles are related to criminal activity or how long they have been submerged in the lake,” Doral police said.

A team of divers from the United Search Corps found submerged cars in the lake this weekend for vehicles linked to cold cases under investigation, nonprofit founder Doug Bishop told CNN on Tuesday.

The lake was one of several hundred spots divers searched on their radar, and “it was 32 cars,” he explained. More than 40 open cases in Miami-Dade and Broward counties are on his radar, Bishop said.

Bishop said the submerged vehicles were not related to any of the cases they were working on, but police were investigating whether they were related to other crimes.

“We have not been able to find any human remains or connect any of them to the cases we have targeted,” he said, adding that more data must be collected.

Miami-Dade police told CNN their divers were working Tuesday to recover the vehicles from the lake with the help of the Miami-Dade Fire Department.

According to Miami-Dade Police, once each vehicle is recovered from the lake, their vehicle identification numbers will be reviewed to determine which department will take over the case.