What we know and don’t know so far about the high school shooting in Santa Fe.

On Friday, May 18, a gunman opened fire at Santa Fe High School in Santa Fe, Texas, reportedly killing multiple people; Santa Fe law enforcement is reporting 10 dead and 13 wounded. They are also reporting that in addition to the shooting, various explosive devices have been found on campus, and the suspect has been identified as 17-year-old Dimitrios Pagourtzis, according to The New York Times, CNN, NBC News, and CBS News.

During a press conference following the incident, it was revealed that a shotgun and pistol were used — neither owned or legally possessed by the shooter. President Trump has also been notified of the situation and gave a brief statement earlier this afternoon.

Santa Fe High School is located roughly 30 miles outside of Houston, and the shooting comes after months of activism in the United States over guns and gun violence led by the survivors of the school shooting in Parkland, Florida, that killed 17 people in February.

Here’s everything we know about this developing situation.