TRENTON, N.J. (AP) — New Jersey Gov. Phil Murphy says he was "staggered" by the fatal shooting at a Florida high school and that "we need action."

Murphy addressed the shooting Thursday and ordered flags to be flown at half-staff on Feb. 20 to honor the victims.

The shooting Wednesday at a Parkland, Florida, high school left 17 people dead. Nineteen-year-old Nikolas Cruz has been charged with 17 counts of premeditated murder.

Murphy, a Democrat, says New Jersey will seek to join "like-minded" states to reach regional solutions. Murphy held a round-table talk this week on gun legislation and has called for enacting what he calls common sense gun safety measures.

Last month, Murphy announced he was rescinding a Christ Christie-era rule that made it easier for residents to acquire carry permits for handguns.