An armed civilian and state trooper shot suspect Tyler Brown after he allegedly fired 50-60 rounds on Memorial Drive in Cambridge, hitting two drivers.

Two people were struck by gunfire during a daytime shooting on Memorial Drive in Cambridge, according to the Middlesex County District Attorney, and are now in critical condition.

Two people sustained life-threatening injuries Monday afternoon after a man opened fire on Memorial Drive near River Street, firing more than 50 rounds at passing vehicles before exchanging gunfire with a Massachusetts State Police officer and an armed civilian,

The gunman who opened fire on passing cars on Memorial Drive in Cambridge is 46-year-old Tyler Brown, according to I-Team sources.

The Sussex Conservation District has announced the appointment of Tyler L. Brown as its new district coordinator.