(KRON) -- There is police activity on the southbound lanes of US 101 in Sausalito, according to the California Highway Patrol. The activity is south of Wolfback Ridge. Photos: Santa Cruz Wharf collapse All lanes were temporarily blocked but as off 2:27 p.m., lanes were open again. The CHP is advising people to expect residual delays. The CHP Marin said it is currently investigating. This is a developing story. Check back for updates.