ANTIOCH (CBS SF) — Police in Antioch have issued a shelter-in-place order for a stretch of F Street that includes the area where three schools are located due to a police investigation into a homicide after a body and a suspicious device were discovered.

The area covered by the order is along F Street between West 11th to West 17th Streets, according to an alert posted on the Antioch Police Department’s Facebook page.

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Multiple schools including Fremont Elementary, Antioch Middle School and Live Oak High are located in that area of Antioch.

An update provided by police confirmed that authorities were investigating a homicide.

Antioch police dispatch received a call at around 7:40 a.m. requesting a welfare check on an individual who was seen down in the area of West 17th and F Street where Live Oak High School is located.

Arriving police officers found a white male in his 50s who had suffered from severe trauma and was unresponsive. The victim was pronounced dead at the scene.

Police said the identity of the victim was unknown as of Monday morning. Officers also noticed wires in the area where the body was found and the Walnut Creek Police bomb squad was called in to assist in the investigation.

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Police issued the shelter-in-place order as the investigation continued.

Antioch Police Department Strategic Communications Officer Darryl Saffold confirmed this is the fourth homicide the department is investigating so far this year.

On Saturday, a suspect has been arrested in connection with a double homicide after his teenage son and girlfriend were found dead at their apartment. Police said currently none of the homicides appear to be related.

All individuals in that area are advised to shelter in place until further notice. There were no details released in regards to the investigation, though there were some unconfirmed online reports that it involved a homicide.

Residents in the area are asked not to call 9-1-1 unless faced with a life-threatening emergency.

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Police will provide more information as it becomes available.

Source: sanfrancisco.cbslocal.com.