More than 2 million cribs from seven companies were recalled Thursday amid concerns that babies can suffocate, become trapped or fall from the cribs.

Most of the cribs were drop-sides, which have a side rail that moves up and down so parents can lift children from them more easily. That movable side, however, can malfunction or detach from the crib, creating a dangerous gap where babies’ heads can become trapped, leading to suffocation or strangulation.

The companies involved in the recall were Evenflo, Delta Enterprises Corp., Child Craft, Jardine Enterprises, LaJobi, Million Dollar Baby and Simmons Juvenile Products Inc.

No deaths were associated with the cribs, but there were reports of at least 16 entrapments of infants. In one case, a child was found unconscious and later hospitalized.

Parents are urged to stop using the cribs and contact the manufacturers for repair kits to immobilize the drop-side or information to make the cribs more secure.