A Delta Air Lines flight to Columbia, South Carolina, was forced to return to Hartsfield-Jackson Atlanta International Airport on Monday morning after a “haze” was observed inside the plane, according to officials.

This marks the second smoke-related issue to impact a Delta flight within a week, just two days after an Australia-bound flight returned to Los Angeles due to smoke on the plane.

Passengers on board a Delta flight on Monday were forced to evacuate via emergency slides after smoke or haze consumed the plane's inside, according to the U.S. Federal Aviation Administration and airline officials.