Both of them were blamed for killing a farmer's leader during a mugging bid the previous day in Burewala.
The arrested accused hails from South Punjab and the authorities are checking their criminal record, said the interior minister.
Eye-witnesses said that there was no ambulance to shift the injured girl to the hospital and was later transferred in a rickshaw.
The citizens thrashed the muggers and later handed them over to the police for further probe.
In a police encounter with an alleged gang mugging people in the Gulistan e Johar area of Karachi, one suspect has been arrested in a wounded state while three managed to escape
All those arrested were handed over to Lahore police for further investigation.
A 15-year-old girl from Jhalandar India thwarted the snatchers' attempt to flee with her phone as she put up a brave fight against assailants and defeated them.
British actor Benedict Cumberbatch has been hailed a hero for chasing away four assailants as they mugged a cyclist in London.