Police Commissioner Fuiavailili Egon Keil has confirmed David Paulo, 20, and Matthew Asimalu, 18, are in custody following the incident.
The Samoa Observer reports they are alleged to have entered a taxi parked in front of a Vaiusu store and put a knife to the driver's neck before ordering him to drive.
The driver told police that during the joyride he managed to drive his taxi into a ditch at Moata'a village and escape.
