Pakistan spin bowler Raza Hasan has been banned for two years after failing a doping test, the country's cricket board said.
The 22-year-old left-armer returned an "adverse analytical finding" from a urine sample taken during a domestic tournament in January, the Pakistan Cricket Board said in a statement.
The board declined to name the substance.
Raza, who has played one one-day international and 10 Twenty20 matches for Pakistan, was notified on March 24 and subsequently failed to send a written request for a hearing within 14 days, the PCB said.
"Therefore in accordance with the Anti-Doping Rules and with the approval of the competent authority, Mr Raza Hassan (Hasan) is being imposed with a ban that will make him ineligible to participate in the sport of cricket for a period of two years," the board said.
Raza made his ODI debut against Australia in Dubai in October and played his last international match in a T20 against New Zealand in the Gulf city in December.