The United States is advising its citizens to "reconsider travel to Turkey at this time" following an attempted military coup and the imposition of a three-month state of emergency, and it has authorized the "voluntary departure" of family members of staff at its embassy in Ankara and consulate in Istanbul.

The travel warning sent by the U.S. Embassy Tuesday said the State Department is continuing to monitor the effect of the abortive coup and the state of emergency on the overall security situation in the country.

Turkey has detained more than 13,000 people in the military, judiciary and other institutions in a purge in the wake of the July 15 attempted coup which killed about 290 people. Tens of thousands of others have been suspended from their jobs.