Palo Alto police officers and a CHP helicopter provided backup early this afternoon while Fremont police detectives reportedly made an arrest at a house at 245 Wilton Ave. near Park Boulevard.
Officers surrounded the house while the helicopter circled overhead shortly after 1 p.m., triggering queries from curious residents of the south-central area of Palo Alto.
A paramedic van also showed up at the home, reportedly in response to a resident of the house experiencing shortness of breath.
Palo Alto police Sgt. Sandra Brown said Palo Alto officers were there for back-up purposes only and did not know the details of the case or who the Fremont officers were seeking.