This looks serious. Turkey military coup

Erdogan is accusing Fethullah Gulen, a former ally now living in exile in the States, of being involved. If you read that article it gives yet more examples of how Erdogan deals with anybody who opposes him.

"The power struggle between the two foes came to a head in late 2013 after judicial officials thought to be close to Gulen brought corruption charges that directly implicated some of Erdogan's inner circle, including his son Bilal.

Erdogan launched a series of counterattacks, purging hundreds of army officers, including top generals, shutting down schools operated by Gulen's movement, Hizmet, and firing hundreds of police officers"

He has also gone after newspapers believed to be sympathetic to his rival, firing their editors or shutting them down.