A suburban New York man who plotted to join a Yemen-based terrorist group faces up to 25 years in prison when he is sentenced Monday.

Marcos Alonso Zea (ZAY'-ah) pleaded guilty in September to attempting to provide material support to al-Qaida in the Arabian Peninsula, also known as Ansar al-Sharia, and obstruction of justice.

Federal prosecutors say the 26-year-old Brentwood, Long Island, man flew to London en route to Yemen in January 2012. He was rejected by customs officials in the United Kingdom and returned to the United States.

Once home, prosecutors say, Zea gave money to and instructed co-conspirator Justin Kaliebe (kah-LEE'-bee), also of Long Island, on how to elude law enforcement surveillance.

Kaliebe, who also has pleaded guilty, faces a sentencing hearing next month.