ANKARA, Aug. 2 (Xinhua) -- Turkey has sent a second request to the U.S. for the extradition of Fetullah Gulen, who is blamed for a recent coup attempt, Turkish Justice Minister Bekir Bozdag said on Tuesday.

Bozdag warned that the relations between Washington and Ankara would be negatively affected if Gulen is not extradited, according to local Hurriyet.

Turkey had initially sent four dossiers to Washington on July 19 demanding Gulen's extradition.

The minister also said at the parliament that Gulen could not go abroad without a U.S. permit.

Gulen, who heads the Fetullah Terrorist Organization (FETO) according to the Turkish government, has been residing in Pennsylvania since 1999.

Turkey's government has repeatedly said the July 15 coup attempt was organized by followers of Gulen.