Authorities in Broward County, Florida, are reporting a shooting at Stoneman Douglas High School in Parkland. The shooter has been taken into custody.

There are fatalities, according to Sen. Bill Nelson, but no confirmation of how many.

Earlier, Broward County Public Schools tweeted that gunshots rang out just before the end of the day.

The school immediately went into lockdown. According to reports, many students were able to get to safety and be reconnected with their families.

White House press secretary Sarah Huckabee Sanders said Trump had been briefed on the situation and the White House was continuing to monitor. Trump tweeted prayers and condolences to the victims.

According to reports, this is the 18th school shooting in the United States of 2018—seven weeks into the year.

Details of this tragedy continue to develop.