SAN FRANCISCO (CBS SF) — A San Francisco police and CHP investigation into a possible freeway shooting closed all southbound lanes of I-280 north of 25th Street for nearly two hours Wednesday, according to authorities.

According to the San Francisco Police Department, officers initially responded around 10:45 a.m. to a report of a shooting near the highway and the Mariposa Street exit, located in the city’s Potrero Hill neighborhood.

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CHP issued a severe traffic alert shortly after 11 a.m. due to the police activity. Authorities did not say anything about the nature of the activity.

Later, the San Francisco CHP office confirmed that officers were investigating a possible shooting on the freeway.

According to CHP Officer Mark Andrews, one person was taken to the hospital with injuries not considered life-threatening.

Footage from Chopper 5 showed CHP examining a white car stopped in the middle of the freeway with it’s doors open.

The SF Bay Area 511.org Twitter account posted about the police activity at around 11:12 a.m., saying the closure was at Cesar Chavez Street. It then tweeted a correction saying that the activity was actually north of 25th Street.

The CHP San Francisco Twitter account noted that all southbound on-ramps at King Street, 6th Street and Mariposa Street would remain closed during the investigation.

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I-280 freeway shooting investigation in San Francisco (CBS)

Shortly after 12:30 p.m., the CHP San Francisco Twitter account posted an update, saying the investigation was ongoing, but that lanes should reopen  within 30 minutes.

All lanes and on-ramps were reopened shortly after 12:45 p.m., according to authorities.

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Motorists are advised to expect residual delays in the area.