One victim is in critical care following an assault on Friday and a second victim sustained serious injuries following an attack on Sunday, police said.
Police said in a statement they were working to establish if the incidents were linked.
"On both occasions, there was more than one offender involved, and the assaults were physical assaults," the statement said.
Both attacks happened in Queens Park.
Police declined to reveal the gender of the victims or the app used.
“In both incidents reported to police, it appears people are using these apps to lure people to secluded locations late at night with the intention to attack them," Southland Area Prevention Manager acting Inspector Mel Robertson.
Police are making inquiries into both incidents, including working to identify and locate the alleged offenders, she said.
“These alleged offenders are engaging with people on these apps with the intention of meeting them in quiet areas at nighttime to attack them.
“Not only are they taking advantage of people’s trust, but they are planning these attacks with the intention to seriously injure these people.
“We urge anybody who is planning to meet someone from a dating app to choose a location which is public, or well-lit at night, as well as letting someone trusted know your plans and movements," acting Insp Robertson said.
The Invercargill City Council said it was working with police and committed to ensuring that everyone felt safe in the city's parks and reserves.
Caroline Rain, the council's manager of parks and recreation, said security cameras were installed in Queens Park across public-facing areas and arterial pathways were lit from dusk to dawn every night.
"Although we have these security measures in place, our parks are, by their nature, open and shared public spaces.
"Visitors are encouraged to follow police advice around meeting people in public... Anyone who notices anything suspicious or dangerous in any of our parks or reserves should contact police."
Police wanted from anybody who has information regarding these assaults, or anyone who was in the Queens Park area between 6pm and 4am from Friday May 8 to Sunday May 10.
Information can be reported to Police via 105, either over the phone or online.
Reference the file number 260510/6480.
- Allied Media
