Former U.S. Sen. Barbara Boxer was assaulted and robbed in Oakland Monday afternoon, her representatives tweeted.

       "The assailant pushed her in the back, stole her cell phone and jumped in a waiting car. She is thankful that she was not seriously injured," the tweet read.

       The Oakland Police Department said in a statement to ABC News that it is investigating the incident, which took place around 1:15 p.m.

       Bill Clark/CQ-Roll Call via Getty Images

       Sen. Barbara Boxer, D-Calif., speaks tin Roll Call in her office in the Hart building at the Capitol, Dec. 2, 2016.

       "The suspect forcefully took loss from the victim, and fled in a nearby waiting vehicle," the police said in a statement.

       A representative for Oakland Mayor Libby Schaaf told ABC News in a statement that the police are working on collecting any surveillance images from the area where the incident took place.

       "[Schaaf] spoke with the Senator’s family to extend her well wishes for a speedy recovery and was relieved to learn she was not seriously injured," spokesman Justin Berton said in a statement.

       Boxer, 80, served as California's U.S. Senate representative from 1993 to 2017. She also served in the House of Representatives for a decade.