Emergency drills

The scenario for the drill was the explosion on a LIRR passenger train. Responders had to locate, triage, treat and transport injured passengers. “We learned a lot,” Riverhead Ambulance Chief Bill Wilkinson said. Photos.

The scenario: A shooter armed with a Glock 9mm handgun enters the emergency room and opens fire. Within three minutes, 25 people — patients and staff — are shot and injured, some seriously. Here's how PBMC, Riverhead Police and other first responders handled the test during a massive emergency drill this morning.

Police, emergency services agencies and Peconic Bay Medical Center will conduct a full-scale mass casualty exercise on Saturday morning at the hospital on Roanoke Avenue, which will be closed to traffic between Middle Road and the Route 58 traffic circle from 7 a.m. to 12 noon.