LOWELL, Mass. — Authorities in Lowell are seeking help from anyone who may have witnessed a deadly collision on the Merrimack River.

A man suffered fatal injuries Tuesday afternoon when two personal watercraft collided on the river.

Middlesex District Attorney Marian Ryan said Wednesday the victim has been identified as 39-year-old Juan Arroyo-Ortiz of Lawrence.

Lowell police along with state and environmental police responded to the incident off Rynne Beach.