The National Cuban Liberation Front (FLNC) in Miami took credit today for an explosion yesterday that gutted the office of Cubana de Aviacion Airlines in Mexico City.

The blast went off at 4:30 a.m. yesterday. "Ignacio," the hooded FLNC spokesman who recently met clandestinely with a Miami News reporter, made the announcement by phone.

"This is part of our continuing strategy to hit Castro wherever and whenever we can," Ignacio said. "It shows once more that the Castro regime is vulnerable."

The blast wrecked the airline office and broke windows in nearby buildings. Guests in an adjacent hotel ran into the street in panic, but nobody was reported hurt.

Mexico City police said the explosion was caused by a small homemade bomb placed under the front door of the airline office.

It was the third bomb attack on Cuban government property in Mexico in the past four months. Last December a bomb exploded at the Cuban consulate and another exploded last month at the Cuban Embassy. Another anti-Castro organization, Alpha 66, took credit for the first explosion.