A message urging people to call authorities if they have information about a missing Brusly High School teacher can be seen on several billboards in Baton Rouge.

Lamar Advertising Co. started displaying the message about Sylviane Lozada on Tuesday on 24 of its 33 digital billboards in the capital city, said Garth Roberts, Lamar vice president and general manager.

The message, which can be updated, if necessary, is scheduled to stay on the billboards through Sept. 30, Roberts said.

Lamar is running the message for free in slots that had not yet been bought, Roberts said. Each of the company’s billboards has six slots that rotate every eight seconds, he said.

A friend of Lozada contacted the company Friday about the idea of displaying the message on the company’s billboards, Roberts said. Lamar put together the artwork Monday, and the message started running Tuesday afternoon.

“We hope for a positive outcome,” Roberts said. “We are keeping our fingers crossed.”

Authorities have said that evidence obtained from Lozada’s home at 2234 Springlake Drive supports possible foul play in the almost month-old missing person case.

In addition, detectives discovered that Lozada’s husband, Oscar Lozada, purchased multiple gray five-gallon buckets with lids and multiple yellow and black bags of Quikrete concrete mix shortly after his wife’s disappearance, authorities have said. The buckets and bags of concrete mix have not been found.

Oscar Lozada has not been named a suspect in his wife’s disappearance, authorities have said. However, detectives would like to talk to him and are trying to contact him.

Authorities started looking for Sylviane Lozada on July 18 when she was reported missing after her relatives in Belgium could not get in touch with her.

Sylviane Lozada’s last contact with her family was around July 5, authorities have said.

Oscar Lozada and the couple’s daughter boarded a plane in Dallas destined for Venezuela on July 9, authorities have said. They were scheduled to return July 14, but have not returned.

Detectives have reason to believe Sylviane Lozada might have been inside her husband’s bright-yellow, 2001 Nissan Xterra on July 5 or July 6, authorities have said.

Casey Rayborn Hicks with the East Baton Rouge Parish Sheriff’s Office said detectives are continuing to look for Sylviane Lozada, and to process and search for evidence in her case. Detectives also are trying to locate and contact Oscar Lozada, Hicks said.

Anyone with information about Sylviane Lozada’s whereabouts or anyone who remembers seeing her husband’s bright-yellow Nissan on July 5 or July 6 is asked to contact the Sheriff’s Office at (225) 389-5000 or Crime Stoppers anonymously at (225) 344-7867.