CORAL GABLES, Fla. -

Police were remaining tight-lipped Saturday after a man and a woman were found dead in a Coral Gables office building.

Police investigated all afternoon Friday at an office building at Monterey and Eighth streets after the deaths were reported about noon.

Miami-Dade police said one person has been detained in connection with the deaths. That person has not been arrested. Police said they are unsure whether the person is a suspect or a possible victim.

They have not said what caused the two people to die, and they have not released a motive.

The victims have not been identified pending the notification of next of kin. Police are being cautious about what information they are releasing and will not say the ages of the victims, the company where they were found or how many other people were in the building at the time.

Investigators are searching for one additional person as a precaution, police said. No further information about that person was available.

Heavily armed officers in bulletproof vests could be seen canvassing the side streets.

Cars crawled along side streets as Eighth Street remained closed Friday afternoon between 47th Avenue and Granada Avenue in Coral Gables as the investigation continued.

People who work in the area told Local 10 police found someone's body inside a yellow two-story building located at the intersection of Monterey and Eighth streets. 

Witnesses said they saw two people running from the yellow building to a nearby Sedano's market, one with a white shirt covered in blood. The witnesses said that person was arrested in front of the Sedano's, and police are searching for the second person.

Onlookers began to pile up to stare at the officers and crime scene vans positioned in a huddle down the street. 

Some snapped pictures. Others mused over cafes con leche at a nearby cafeteria about what they've heard happened. 

Some people came to the scene because they have friends or loved ones who work at the Sedano's store.

"We can't leave from here. We can't get in, either, for security reasons. It's due to security," one man said.

On Friday afternoon, Sedano's Supermarkets spokesman Javier Herran released the following statement:

"The incident that is currently being investigated by the police in Coral Gables at 801 Monterey did not take place inside our store located off Granada Boulevard and SW 8th St. We have been asked by authorities to temporarily close our store, and we are fully cooperating. The safety and welfare of our employees and customers are our top priority. We thank the Miami-Dade, City of Coral Gables and City of Miami Police forces for their support and guidance, and for protecting our employees and customers."

Jose Morales works at Sedano's and said it was a scary situation as officers with K-9's searched every aisle of the grocery store. He said they were told police were making sure something was not hiding inside the store. He said they were required to stay inside the store for more than five hours. Many people were frantically calling family and friends, Morales said.