Turkey on Saturday arrested 49 alleged members of the Islamic State (ISIS) group, some of whom were suspected of planning an attack on Turkey's national holiday on Sunday, AFP reported, citing the state-run Anadolu news agency.
The arrests in the capital Ankara came a day before celebrations across the country for the 94th anniversary of Republic Day.
Turkish authorities issued warrants for 55 suspected foreign ISIS members, believing some were planning an attack on Republic Day, Anadolu reported, without giving further details.
Turkey has been hit by several terrorist attacks carried out by ISIS over the past two years, including a New Year's Eve attack on an Istanbul nightclub this year, in which 39 people were killed by an ISIS gunman.
In the days following the Istanbul attack, Turkish police detained almost 450 suspected ISIS members around the country.
There has been a lull in attacks since the New Year's attack, but tensions remain high.