An early evening bomb scare Wednesday at a Pacific plastics company caused police to evacuate two buildings, two residences and block off streets while bomb-sniffing dogs searched the buildings.

At about 7 p.m. Wednesday, Pacific police were notified that the plant manager at Aurora Technologies (ATI), 19 Industrial Drive, had received an email to evacuate the building, according to Capt. Larry Cook, assistant police chief.

Because ATI has two buildings in the industrial park, police evacuated both buildings and blocked off the street near the buildings.

“We also evacuated a couple of houses on Candlewick Lane,” Cook said.

Police called the Lambert Airport in St. Louis to request the use of a bomb-sniffing dog. Three dogs were sent — two from the airport and one from St. Louis County.

“They carefully went through both of the buildings,” Cook said. “Nothing was found and by 11:30 p.m. we gave the all clear.”

Police received the name of one individual in connection with the email and that person was picked up by the Union Police Department and brought to Pacific. The individual was questioned and released.

“We have a second person of interest in the incident,” Cook said. “The investigation is still ongoing.”

Cook said he did not want to share the exact language of the email message until the investigation was completed.