The driver, Alex, says he was about to get on an onramp, heading east on I-80 around 4:30 p.m. There, he witnessed someone jump out of a Honda Accord and smash a window of a Prius in front of him.
The thief grabbed a bag and drove off.
ABC7's Dion Lim spoke to the victims of the robbery, a husband and wife, who are from Iran.
Ben says him and his wife, Masha, are real estate photographers and were on a shoot near Dolores Park.
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Ben, who was in the passenger seat of the Prius, says his wife noticed someone following them after the shoot.
The couple says about $7,000 worth of camera equipment was stolen. They said they have not seen anything like this before and have filed a police report.
If you have any information regarding this incident, you may e-mail the couple at info@homeshots.us.