The Air Force base in Tampa is on lockdown while law enforcement officers respond to reports of an active shooter. TAMPA, Fla. — Law enforcement members are responding to MacDill Air Force Base after reports of an active shooter. MacDill confirmed the base in Tampa was on lockdown Friday morning, but the lockdown has since been lifted. The base confirmed it is still investigating the possibility of an active shooter. No further information was immediately available. Traffic is at a standstill on numerous roads around the base near downtown Tampa.