The school week at Grosse Pointe North and Grosse Pointe South high schools started off with an increased police presence, as authorities responded to a threat made against South High School during "social media bantering" over the weekend.

Gary Niehaus, superintendent of the Grosse Pointe Public School System, said that over the weekend, about 100 students between the two schools were "bantering back and forth" via social media, during which the threat against South High School was made.

The school day started on time and has gone on normally otherwise, Niehaus said.

Police in Grosse Pointe Woods, where North High School is located, directed calls to police in Grosse Pointe Farms, where South High School is located. Farms police said it could not make a comment while the incident was being investigated.

"Faculty, staff and parents have all been alerted," Niehaus said.

Niehaus said police identified a suspect, a male, visited that person's house, and found no weapons.

"There was a threat, but no weapons," Niehaus said. Further, Niehaus said, "I'm not sure he is one of our students. This individual looked a little older than high school age."