San Diego ? Mexican authorities have arrested Jose Ernesto Beltran Quinonez, who’s accused of making a phony threat of a nuclear attack on Boston earlier this year.

A three-count indictment charges Beltran, 34, with perpetrating a terrorist hoax and making false statements about an alleged plot to smuggle a nuclear warhead into the U.S. from Mexico.

The scare in January prompted authorities to alert the public and to increase security at the airport and on the subway.

U.S. authorities expect he will be extradited within 60 days, said FBI spokeswoman Jan Caldwell. He was to be tried in San Diego.