LOS ANGELES, Oct. 1 -- Two American citizens of Pakistani descent returned to the United States on Sunday, five months after they were denied permission to fly home to California unless they submitted to an interrogation by F.B.I. terrorism investigators.

The men, Muhammad Ismail, 45, and his son, Jaber, 19, of the Northern California farming town of Lodi, returned from Pakistan on a flight that landed at Kennedy Airport in New York around 3:30 p.m. Eastern time. They were scheduled to arrive in California on Sunday night or early Monday on a connecting flight, their lawyer said Sunday.

The Ismails are an uncle and cousin of Hamid Hayat, a Lodi man who was convicted in April in federal court of providing material support to terrorists. Mr. Hayat told investigators he had attended a terrorism training camp during a long stay in Pakistan and intended to carry out unspecified attacks in the United States. Mr. Hayat's father, Umer, was convicted on a lesser charge of lying to investigators about the amount of cash he carried to Pakistan on a 2003 trip, but a jury deadlocked on terrorism charges.

The Ismails were not charged in the case. They attributed their predicament to being related to the Hayats, the only people to have been charged in what federal prosecutors have described as an investigation into possible terrorism links in Lodi.