City police commissioner T Yoganand said they had arrested Dadi Hema Kumar, resident of Anakapalle, and B Hemanth.
The incident had taken place near Salapuvanipalem in Parawada area in the city on May 22.
A speeding car driven by Dadi Hema Kumar hit Moturu Lavanya, Divya and Mohan Kumar when they were returning to Vadlapudi near Gajuawaka on a motorcycle after visiting Nukalamma temple at Anakapalle.
Kumar was allegedly drunk at the time. Hemanth was with him in the car. Lavanya died on the spot.
Commissioner Yoganand said that no motive for murder was established, and CCTV footage at the temple did not suggest that such eve-teasing had happened.