After a trio used a dating app to lure a victim to a Pomona park where they carjacked him and stole his phone, investigators in turn used another app to tracked down and arrest the group, Pomona police said on Monday.

Anthony Soto, 38, of Pomona, relative Javier Soto, 19, of La Puente, and Javier Soto’s girlfriend, Alaiza Gamez, 18, of Whittier were arrested Sunday night on suspicion of carjacking, robbery, grand theft auto and making criminal threats.

The victim met Gamez on an online dating app and made arrangements to meet at Washington Park, 865 E Grand Ave., at around 1:30 a.m. Sunday, March 3, police said.

Gamez and the victim were sitting in the victim’s 2012 Tan Chevy Cruze when the Sotos walked up, pulled the victim from the vehicle and demanded he empty his pockets, police said.

One of the three pointed a stun gun at the victim, then, police said, the trio took the victim’s cellphone and vehicle.

The victim noticed a subwoofer he believed came from his vehicle posted for sale on the online selling app, OfferUp, and told Pomona police.

Officers set up a meeting in a parking lot on the 400 block of South Garey Avenue with the sellers. A black Honda Civic pulled in with three people inside: Gamez and Javier and Anthony Soto, police said. They were detained.

Investigators determined the Honda the three arrived in was stolen out of Whittier.

The Pomona victim’s car was still missing: It’s a 2012 tan Chevy Cruze with a California license plate number of 8BGB638. Investigators asked anyone with information on the case to call them at 909-620-2085.