SAN JUAN, Puerto Rico (AP) _ An American Airlines DC-10 blew several tires when it landed Friday afternoon at Luis Munoz Marin International Airport on a flight from New York. Passengers were shook up, but no one was injured.

''It seemed we stopped short, like it was a very short runway,'' said Frank Vuolo of Middletown, N.Y.

Al Morales, a New York City policeman, said, ''If you didn't have a seat belt on, you would have flown'' from the seat.

The Federal Aviation Administration sent inspectors to the scene, but could not immediately determine why the tires exploded. ''Everything was normal on the landing,'' said Juan Cruz, manager of the FAA's Caribbean Flight Standards District Office.

''I don't have an explanation why the tires blew,'' Cruz said.

Passengers said a loud ''pop'' was heard when the plane landed, then another after the plane had come to a halt and fire trucks and other emergency vehicles could be seen approaching.

''After the second tire blew, everyone started screaming,'' said passenger John Morales.